ProSE

Identifies peptides in MS/MS spectra.

pot. predecessor tools	→ ProSE →	pot. successor tools
any signal-/preprocessing tool (in mzML or Bruker .d format)		IDFilter or any protein/peptide processing tool

This search engine is mainly for educational/benchmarking/prototyping use cases. It lacks behind in speed and/or quality of results when compared to state-of-the-art search engines.

Note

Currently mzIdentML (mzid) is not directly supported as an input/output format of this tool. Convert mzid files to/from idXML using IDFileConverter if necessary.

Open-search mode is automatically determined by the precursor mass tolerance: enabled when tolerance exceeds 1 Da or 1000 ppm. No explicit open-search parameter is needed. This is logged at runtime and recorded in the output search parameters as UserParam 'open_search'.

Decoy handling is controlled by '-Search:decoys'. The default 'auto' ensures decoys are available for target-decoy FDR: it reuses decoys already present in the FASTA (the marker is auto-detected, prefix or suffix, e.g. from DecoyDatabase) or generates them internally (prefixing accessions with '-Search:decoy_prefix', default "DECOY_") if none are found. Use 'generate' to always (re)build decoys from the targets, or 'ignore' to search the targets only.

Decoy reporting is tied to protein-level FDR, not to PSM-level FDR. Setting '-Search:FDR:protein' > 0 signals "finalize this result": picked-protein FDR is applied and decoys are removed. PSM-level FDR ('-Search:FDR:PSM') filters target and decoy PSMs alike by the q-value threshold; it does no decoy-specific stripping, so decoys that pass the threshold are kept. With '-Search:FDR:protein' = 0 (the default), decoys are retained in every output (target+decoy evidence with scores). The '-out_pin' files are an exception to both: they are written before any FDR filter and keep the decoys. To obtain a clean, decoy-free result without protein FDR, run IDFilter with '-remove_decoys' downstream.

Protein-level FDR scope: picked-protein FDR does not compose across runs, so it is applied (and decoys removed) only on a complete protein set — a single input file, or the pooled '-out_merged' set of a multi-file run. For a multi-file run with '-Search:FDR:protein' > 0 but no '-out_merged', protein FDR is NOT applied (no output represents a complete experiment); ProSE warns and leaves the per-file outputs as intermediates (decoys retained).

Percolator rescoring: by default ('-Search:rescore true'), the PSMs of each input file are rescored separately with OpenMS' built-in (in-process) Percolator implementation, the same backend PercolatorAdapter uses by default. No percolator executable is needed (the former '-percolator_executable' parameter and '-rescore' flag were removed). Training uses the standard Percolator feature set plus ProSE's search engine features, '-train_best_positive' and target-decoy competition ('-post_processing_tdc'); Percolator q-values become the main score (the SVM score and PEP are kept as meta values MS:1001492/MS:1001493, the HyperScore as meta value 'ln(hyperscore)'), only the best hit per spectrum is kept, and the runs report 'Percolator' as search engine. The PSM and protein FDR thresholds are then applied on the rescored PSMs. A file with fewer than 100 PSMs or without decoys, or for which Percolator fails, is not rescored: ProSE prints a warning, keeps its HyperScores (FDR is then computed from them) and continues; the end-of-search report states how many files were rescored. Set '-Search:rescore false' to report ProSE's own scores. '-out_pin' always holds ProSE's own scores (see there).

Search:peptide:clip_nterm_methionine=true also searches the mature N-terminal peptide after loss of exactly the initial methionine of an M-leading protein. Both forms are searched with the configured length, mass and missed-cleavage limits. Protein N-terminal variable modifications also apply after clipping. Set false to restore the previous search space; internal methionines are not clipped. Generated decoys retain the initial M when enabled; supplied decoys are searched as provided.

Local peak filtering: Search:peaks:window_type=auto retains up to Search:peaks:window_top peaks in every 100 Da window, including the short final window, for high-resolution fragments (tolerance <= 0.1 Da or <= 100 ppm). Low-resolution auto retains the legacy width-scaled final quota. Use jump for legacy filtering at every resolution, or jump_full to always retain the full quota. This changes high-resolution preprocessing, not the scoring formula.

Self-trained fragment ion priors: with Search:annotate:self_trained_ion_priors (on by default) each file learns how its fragment ions appear: presence, intensity rank among all peaks after deisotoping (before the Search:peaks:window_top and Search:peaks:keep_n filters) and mass error, per ion series, precursor and fragment charge, relative cleavage position, residues at the cleavage site (before P, after D or E) and presence of the complementary ion (Search:annotate:ion_prior_model 'rich'; 'basic' keeps series, charges and position, and the rank only). The model learns from the confident target PSMs (target-decoy competition q <= Search:annotate:ion_prior_train_fdr of the native score) against their reversed sequences on the same spectra. The spectra are split into two halves by scan parity, and every PSM is scored by the model of the other half (cross-fitting), so a PSM's own spectrum and label never enter the model that scores it. Every PSM gets the Percolator features of Search:annotate:ion_prior_features (ion_prior_llr and ion_prior_explained); native scores and the reported candidates are unchanged. Nothing is pre-trained: a file with fewer than Search:annotate:ion_prior_min_psms confident PSMs in either half gets zeros (and a warning); at that boundary a single label decides between the features and zeros for the whole file. Target-only searches (Search:decoys ignore) learn and write nothing. The peak lists are kept in a compact form (m/z and rank, 5 bytes per peak) until the PSMs are annotated.

Ion mobility: the drift time of an MS2 spectrum is written to its identification. An ion mobility (e.g. 1/K0 of Bruker timsTOF DDA-PASEF data) is written as meta value 'IM', with its unit as 'IM' on the run; a FAIMS compensation voltage (Thermo FAIMS data, from .raw or mzML) is written as 'FAIMS_CV', which the FAIMS-aware tools (e.g. ProteomicsLFQ, MS1LabeledWorkflow, FeatureFinderIdentification) read.

Several input files: give all files that share the database and the search parameters to one call ('-in a.mzML b.mzML ...'). The fragment index is then built once instead of once per file, and with more than one thread the next mzML file is read while the current one is searched. Each file gets the same identifications as when it is searched alone, and the whole run usually takes less time than one call per file. Compare search engines in the same mode.

Threads: '-threads' sets the OpenMP threads of the search; mzML files are read with a share of them. With many threads on a shared machine, set the environment variable OMP_WAIT_POLICY=passive: idle OpenMP threads then sleep instead of spinning, which saves CPU time at about the same wall time. Do not bind threads (OMP_PROC_BIND), which made ProSE slower.

Memory in chunked multi-file runs: '-Search:database:chunk_size' bounds the fragment-index memory only. With multiple '-in' files and chunking active, the chunk-major schedule keeps every input file's preprocessed MS2 spectra in memory for the whole search (each chunk's index is built once and scored against all files). Budget roughly the sum of all files' MS2 peak data on top of one chunk's index, or split very large cohorts across separate invocations (see the sharded-FDR workflow below).

Deferred / distributed (sharded) FDR: to search shards on separate nodes and control FDR globally afterwards, run each shard with '-Search:FDR:protein' = 0 (the default), optionally with '-Search:FDR:PSM' > 0 for per-run PSM filtering. Per-file outputs retain the full target+decoy set, so you can pool them and apply FDR once downstream — e.g. IDMerger → ProteinInference / Epifany → FalseDiscoveryRate / IDFilter (idXML route) — or run a single ProSE process over all shards with '-out_merged'.

The command line parameters of this tool are:

ProSE -- Annotates bottom-up MS/MS spectra using ProSE.
Full documentation: http://www.openms.de/doxygen/nightly/html/TOPP_ProSE.html
Version: 3.7.0-pre-nightly-2026-10-20 Oct 21 2026, 01:35:41, Revision: 8d0afe1
To cite OpenMS:
 + Pfeuffer, J., Bielow, C., Wein, S. et al.. OpenMS 3 enables reproducible analysis of large-scale mass spec
   trometry data. Nat Methods (2024). doi:10.1038/s41592-024-02197-7.

Usage:
  ProSE <options>

Options (mandatory options marked with '*'):
  -in <files>*                                             Input spectrum file(s). Multiple files are searche
                                                           d against the same database; the fragment index 
                                                           is built once and reused. (valid formats: 'mzML', 
                                                           'd', 'raw')
  -database <file>*                                        Input protein sequence database in FASTA format. 
                                                           (valid formats: 'fasta', 'fa', 'faa')
  -out_idxml <files>                                       Output idXML identification file(s). Must have 
                                                           the same number of entries as -in. (valid formats:
                                                            'idXML')
  -out_merged <file>                                       Optional merged output file containing all PSMs 
                                                           pooled across input files with cross-file protein 
                                                           inference (BasicProteinInferenceAlgorithm) and 
                                                           optional picked-protein FDR (FDR:protein). Per-fil
                                                           e outputs (-out_idxml / -out_qpx / -out_parquet) 
                                                           retain run-level information. Only useful with 
                                                           multiple -in files. (valid formats: 'idXML')

Search:
  -Search:enzyme <choice>                                  The enzyme used for peptide digestion. (default: 
                                                           'Trypsin') (valid: 'glutamyl endopeptidase', 'Glu-
                                                           C+P', 'elastase-trypsin-chymotrypsin', 'no cleavag
                                                           e', 'Clostripain/P', 'cyanogen-bromide', 'PepsinA 
                                                           + P', 'Alpha-lytic protease', '2-iodobenzoate', 
                                                           'iodosobenzoate', 'staphylococcal protease/D', 
                                                           'Arg-C', 'Arg-C/P', 'Chymotrypsin', 'Chymotrypsin/
                                                           P', 'Trypsin/P', 'proline-endopeptidase/HKR', 'uns
                                                           pecific cleavage', 'V8-DE', 'CNBr', 'V8-E', 'Asp-N
                                                           ...
                                                           psin')
  -Search:decoys <choice>                                  Decoy handling for target-decoy FDR. 'auto': ensur
                                                           e decoys are available — reuse decoys already 
                                                           present in the database (marker auto-detected, 
                                                           prefix or suffix) or generate them if none are 
                                                           found. 'generate': always (re)generate decoys from
                                                            the target proteins (any pre-existing decoys are 
                                                           removed first to avoid decoy-of-decoy entries). 
                                                           'ignore': search the target proteins only — any 
                                                           decoys present in the database are removed. (defau
                                                           lt: 'auto') (valid: 'auto', 'generate', 'ignore')
  -Search:low_memory                                       Non-specific searches (peptide:enzyme_specificity=
                                                           none; ignored otherwise): index the peptide masses
                                                           , as the prefixes of one mother peptide per protei
                                                           n position, instead of the fragments of every pept
                                                           idoform, and generate the fragments of the peptido
                                                           forms in the precursor window at query time. Finds
                                                            the same candidates with a fraction of the memory
                                                            (e.g. for immunopeptidomics against a human datab
                                                           ase), but takes more time per spectrum, the more 
                                                           the wider the precursor window.
  -Search:rescore <choice>                                 Rescore the PSMs of every search run (input file) 
                                                           in-process with Percolator (OpenMS' built-in imple
                                                           mentation, as PercolatorAdapter uses by default) 
                                                           before the FDR filters: Percolator q-values become
                                                            the main score (the SVM score and PEP are kept 
                                                           as meta values), only the best hit per spectrum 
                                                           is kept, and FDR:PSM and FDR:protein are applied 
                                                           to the rescored PSMs. Needs decoys (see 'decoys') 
                                                           ...
                                                           to report the search engine scores. (default: 'tru
                                                           e') (valid: 'true', 'false')

Precursor (Parent Ion) Options. mass_tolerance_lower/_upper are positive magnitudes applied as [-lower, +uppe
r] around the precursor mass.:
  -Search:precursor:mass_tolerance_lower <value>           Lower-side precursor-mass tolerance (positive magn
                                                           itude; effective window is [-lower, +upper] around
                                                            the precursor). When strongly asymmetric, also 
                                                           review precursor:isotope_error_min. (default: '10.
                                                           0') (min: '0.0')
  -Search:precursor:mass_tolerance_upper <value>           Upper-side precursor-mass tolerance (positive magn
                                                           itude). (default: '10.0') (min: '0.0')
  -Search:precursor:mass_tolerance_unit <choice>           Unit of precursor mass tolerance. (default: 'ppm')
                                                            (valid: 'ppm', 'Da')
  -Search:precursor:min_charge <number>                    Minimum precursor charge to be considered. (defaul
                                                           t: '2')
  -Search:precursor:max_charge <number>                    Maximum precursor charge to be considered. (defaul
                                                           t: '5')
  -Search:precursor:isotope_error_min <number>             Minimum precursor isotope error searched, in 13C 
                                                           spacings (1.00336 Da) added to the observed precur
                                                           sor mass: -1 finds a peptide whose first 13C isoto
                                                           pe peak was selected as the precursor. The PSM 
                                                           meta value 'isotope_error' reports the opposite 
                                                           sign by default (see report:isotope_error_conventi
                                                           on). (default: '-1')
  -Search:precursor:isotope_error_max <number>             Maximum precursor isotope error searched, with 
                                                           the sign of precursor:isotope_error_min: +1 finds 
                                                           a peptide whose precursor was selected one 13C 
                                                           spacing below its monoisotopic peak. (default: 
                                                           '1')

Fragments (Product Ion) Options:
  -Search:fragment:mass_tolerance <value>                  Fragment mass tolerance (default: '20.0')
  -Search:fragment:mass_tolerance_unit <choice>            Unit of fragment m (default: 'ppm') (valid: 'ppm',
                                                            'Da')
  -Search:fragment:deisotope <choice>                      MS2 deisotoping (single-charge deconvolution) befo
                                                           re searching. 'auto' deisotopes only when the frag
                                                           ment tolerance is within the high-resolution deiso
                                                           toper range (<= 0.1 Da / <= 100 ppm) and skips it 
                                                           for low-resolution (e.g. ion-trap CID) data; 'true
                                                           ' always deisotopes (requires a high-resolution 
                                                           fragment tolerance); 'false' never deisotopes. 
                                                           (default: 'auto') (valid: 'auto', 'true', 'false')

  -Search:fragment:min_mz <number>                         Minimal fragment mz for database (default: '150')
  -Search:fragment:max_mz <number>                         Maximal fragment mz for database (default: '2000')

  -Search:fragment:min_ion_index <number>                  Ions with index less than or equal to this value 
                                                           are not added to the fragment index (use 0 to incl
                                                           ude all ions; 2 skips b1/b2/y1/y2). Low-index ions
                                                            are often noisy and unreliable. (default: '2') 
                                                           (min: '0')
  -Search:fragment:min_matched_ions <number>               Minimal number of matched ions to report a PSM 
                                                           (default: '5')
  -Search:fragment:max_charge <number>                     Max fragment charge (default: '2')

Modifications Options:
  -Search:modifications:fixed <list>                       Fixed modifications, specified using UniMod (www.u
                                                           nimod.org) terms, e.g. 'Carbamidomethyl (C)' (defa
                                                           ult: '[Carbamidomethyl (C)]') (valid: '15N-oxobuta
                                                           noic (N-term C)', '15N-oxobutanoic (Protein N-term
                                                            S)', '15N-oxobutanoic (Protein N-term T)', '2-dim
                                                           ethylsuccinyl (C)', '2-methylbutyryl (K)', '2-mono
                                                           methylsuccinyl (C)', '2-nitrobenzyl (Y)', '2-succi
                                                           nyl (C)', '2HPG (R)', '2PCA-triazole-ethanethiol 
                                                           (N-term)', '3-deoxyglucosone (R)', '3-hydroxy-3-me
                                                           thylglutaryl (K)', '3-hydroxybenzyl-phosphate (K)'
                                                           ...
                                                           'ZGB (N-term)', 'ZQG (K)')
  -Search:modifications:variable <list>                    Variable modifications, specified using UniMod 
                                                           (www.unimod.org) terms, e.g. 'Oxidation (M)'. A 
                                                           terminus and a residue carry one modification each
                                                           : a variable terminal modification (e.g. 'Acetyl 
                                                           (Protein N-term)', 'Gln->pyro-Glu (N-term Q)') is 
                                                           not searched where a fixed one sits on that termin
                                                           us (e.g. 'TMT6plex (N-term)'), and a variable resi
                                                           due modification (e.g. 'Glutathione (C)') is not 
                                                           searched where a fixed one sits on that residue 
                                                           (e.g. 'Carbamidomethyl (C)'). (default: '[Oxidatio
                                                           n (M)]') (valid: '15N-oxobutanoic (N-term C)', 
                                                           '15N-oxobutanoic (Protein N-term S)', '15N-oxobuta
                                                           noic (Protein N-term T)', '2-dimethylsuccinyl (C)'
                                                           , '2-methylbutyryl (K)', '2-monomethylsuccinyl 
                                                           (C)', '2-nitrobenzyl (Y)', '2-succinyl (C)', '2HPG
                                                            (R)', '2PCA-triazole-ethanethiol (N-term)', '3-de
                                                           oxyglucosone (R)', '3-hydroxy-3-methylglutaryl 
                                                           (K)', '3-hydroxybenzyl-phosphate (K)', '3-hydroxyb
                                                           ...
                                                           'ZGB (N-term)', 'ZQG (K)')
  -Search:modifications:variable_max_per_peptide <number>  Maximum number of residues carrying a variable 
                                                           modification per candidate peptide (default: '2')

Annotation Options:
  -Search:annotate:PSM <list>                              Annotations added to each PSM. (default: '[ALL]') 
                                                           (valid: 'ALL', 'fragment_mz_error_median_ppm', 
                                                           'precursor_mz_error_ppm', 'matched_prefix_ions_fra
                                                           ction', 'matched_suffix_ions_fraction', 'num_match
                                                           ed_peaks', 'matched_prefix_ions', 'matched_suffix_
                                                           ions', 'longest_peptide_ion_sequence', 'matched_io
                                                           n_current', 'fragment_annotation', 'hyperscore_zsc
                                                           ore', 'ln_num_candidates', 'matched_ion_current_fr
                                                           action', 'complementary_ions_fraction')

PeptDeep (ONNX) prediction-based rescoring features:
  -Search:peptdeep:enable                                  Add PeptDeep prediction-based rescoring features 
                                                           (ms2_cosine, ms2_spectral_angle, ms2_pearson, ms2_
                                                           frac_pred_found, rt_abs_error) to every PSM. Uses 
                                                           the models shipped in OpenMS' 'share/OpenMS/models
                                                           ' unless 'peptdeep:ms2_model'/'peptdeep:rt_model' 
                                                           name others. Requires an OpenMS built with ONNX 
                                                           support.
  -Search:peptdeep:ms2_model <text>                        PeptDeep MS2 fragment-intensity ONNX model, used 
                                                           when 'peptdeep:enable' is true. A relative name 
                                                           is resolved against OpenMS' shared-data directory;
                                                            an absolute path is used as given. (default: 'mod
                                                           els/peptdeep_ms2_dynamic.onnx')
  -Search:peptdeep:rt_model <text>                         PeptDeep retention-time ONNX model. See 'peptdeep:
                                                           ms2_model'. (default: 'models/peptdeep_rt_dynamic.
                                                           onnx')
  -Search:peptdeep:instrument <choice>                     Instrument class passed to the PeptDeep MS2 model.
                                                            An instrument that is not in this list is best 
                                                           approximated by the closest one that is. (default:
                                                            'QE') (valid: 'QE', 'Lumos', 'timsTOF', 'SciexTOF
                                                           ', 'ThermoTOF')
  -Search:peptdeep:nce <value>                             Normalised collision energy for the PeptDeep MS2 
                                                           model. Negative selects it automatically from the 
                                                           collision energy recorded in the spectra, refined 
                                                           by scoring a small grid on confident PSMs. (defaul
                                                           t: '-1.0')

Peptide Options:
  -Search:peptide:min_size <number>                        Minimum size a peptide must have after digestion 
                                                           to be considered in the search. (default: '7')
  -Search:peptide:max_size <number>                        Maximum size a peptide must have after digestion 
                                                           to be considered in the search (0 = disabled). 
                                                           (default: '40')
  -Search:peptide:missed_cleavages <number>                Number of missed cleavages. (default: '1')
  -Search:peptide:clip_nterm_methionine <choice>           Also search protein N-terminal peptides after remo
                                                           val of their initial methionine. The retained-M 
                                                           form is still searched; length, mass and missed-cl
                                                           eavage limits apply to each form. Set false for 
                                                           the previous search space. (default: 'true') (vali
                                                           d: 'true', 'false')
  -Search:peptide:enzyme_specificity <choice>              Enzyme cleavage specificity required for both pept
                                                           ide termini.
                                                             'full' : both termini must be enzyme-specific 
                                                           (canonical, e.g. tryptic).
                                                             'semi' : only one terminus needs to be enzyme-sp
                                                           ecific (semi-tryptic).
                                                             'none' : no enzyme constraint at either terminus
                                                           ; every substring of length
                                                           ...
                                                           max_size'. (default: 'full') (valid: 'full', 'semi
                                                           ', 'none')
  -Search:peptide:motif <text>                             If set, only peptides that contain this motif (pro
                                                           vided as RegEx) will be considered.
  -Search:peptide:min_mass <number>                        Minimal peptide mass for database (default: '100')

  -Search:peptide:max_mass <number>                        Maximal peptide mass for database (default: '9000'
                                                           )

Reporting Options:
  -Search:report:top_hits <number>                         Maximum number of top scoring hits per spectrum 
                                                           that are reported. (default: '1')

False Discovery Rate control (requires decoys):
  -Search:FDR:PSM <value>                                  Filter PSMs based on q-value (e.g., 0.05 = 5% FDR;
                                                            0 disables the filter). Target and decoy PSMs 
                                                           are filtered alike by the threshold; decoys that 
                                                           pass are kept (no decoy-specific stripping here 
                                                           — decoys are removed only at protein-FDR finaliz
                                                           ation). With 'rescore' (the default), the threshol
                                                           d applies to the Percolator q-values, the main 
                                                           score of the rescored PSMs. Without rescoring ('re
                                                           ...
                                                           d with a warning. (default: '0.0') (min: '0.0' 
                                                           max: '1.0')
  -Search:FDR:protein <value>                              Filter proteins based on picked-protein FDR q-valu
                                                           e (e.g., 0.01 = 1% protein FDR, set to 0 to disabl
                                                           e). Applied after PSM-level FDR on a complete prot
                                                           ein set (single file, or the -out_merged aggregate
                                                           ). Setting this > 0 finalizes the result: identifi
                                                           ed decoys are removed. With 0, decoys are retained
                                                            for downstream/merged FDR. Uses the picked-protei
                                                           n approach (Savitski et al. 2015) which pairs targ
                                                           et and decoy proteins by accession. Needs decoys 
                                                           ('decoys' auto or generate). (default: '0.0') (min
                                                           : '0.0' max: '1.0')

Search/Scoring Limits:
  -Search:scoring:max_candidates_per_spectrum <number>     The number of initial hits for which we calculate 
                                                           a score (default: '50')

Theoretical ion series toggles:
  -Search:ions:add_y_ions <choice>                         Add peaks of y-ions to the spectrum (default: 'tru
                                                           e') (valid: 'true', 'false')
  -Search:ions:add_b_ions <choice>                         Add peaks of b-ions to the spectrum (default: 'tru
                                                           e') (valid: 'true', 'false')
  -Search:ions:add_a_ions                                  Add peaks of a-ions to the spectrum
  -Search:ions:add_c_ions                                  Add peaks of c-ions to the spectrum
  -Search:ions:add_x_ions                                  Add peaks of  x-ions to the spectrum
  -Search:ions:add_z_ions                                  Add peaks of z-ions (y - NH3) to the spectrum. 
                                                           These are not the z+1 ions of ETD-type spectra; 
                                                           see ions:by_activation and ions:add_zp1_ions.
  -Search:ions:add_zp1_ions                                Add peaks of z+1 ions (z-dot, y - NH2) to the spec
                                                           trum, the main C-terminal fragments of ETD, EThcD 
                                                           and ETciD spectra, for all spectra. ions:by_activa
                                                           tion adds them (with c ions) for spectra recorded 
                                                           as electron-activated; set this, typically with 
                                                           ions:add_c_ions, for ETD-type data without activat
                                                           ion information.
  -Search:ions:by_activation <choice>                      Score spectra whose precursor was activated by 
                                                           electrons (ETD, ECD, EThcD or ETciD, as recorded 
                                                           in the input file) with c and z+1 ions in addition
                                                            to the ion series above. Other spectra, and spect
                                                           ra without activation information, use the ion 
                                                           series above. (default: 'true') (valid: 'true', 
                                                           'false')

Automatic mass accuracy calibration (two-pass search). A fast first pass on a subset of spectra estimates 
instrument-specific mass accuracy, then the main search uses the calibrated (typically tighter) tolerances 
for better discrimination.:
  -Search:calibration:enabled                              If enabled, run a fast calibration pass on a subse
                                                           t of spectra before the main search. Estimates 
                                                           tighter precursor and fragment tolerances from 
                                                           confident PSMs. The fragment index is NOT rebuilt 
                                                           — only query-time tolerances are tightened. Insp
                                                           ired by MSFragger's calibrate_mass and OpenNuXL's 
                                                           autotune.
  -Search:calibration:subset_ratio <value>                 Fraction of spectra (by TIC, highest first) used 
                                                           for the calibration pass (0.0-1.0). (default: '0.1
                                                           ') (min: '0.01' max: '1.0')
  -Search:calibration:min_psms <number>                    Minimum number of confident PSMs required for cali
                                                           bration. If fewer are found, calibration is skippe
                                                           d and the user-configured tolerances are used. 
                                                           (default: '50') (min: '1')

Search:database:
  -Search:database:chunk_size <number>                     Split the protein database into chunks of at most 
                                                           this many proteins for fragment index building. 0 
                                                           = disabled (load entire database at once). Enable 
                                                           for very large databases (e.g. MHC-II immunopeptid
                                                           omics with variants) that exceed available memory.
                                                            Each chunk builds its own fragment index; results
                                                            are merged across chunks before post-processing. 
                                                           Calibration (when enabled) runs on a strided, size
                                                           ...
                                                           cohorts across separate ProSE invocations. (defaul
                                                           t: '0') (min: '0')

                                                           
Common TOPP options:
  -ini <file>                                              Use the given TOPP INI file
  -threads <n>                                             Sets the number of threads allowed to be used by 
                                                           the TOPP tool (0 = all available cores) (default: 
                                                           '1')
  -write_ini <file>                                        Writes the default configuration file
  --help                                                   Shows options
  --helphelp                                               Shows all options (including advanced)

INI file documentation of this tool:

Legend:

required parameter

advanced parameter

This section lists all parameters supported by the tool. Parameters are organized into hierarchical subsections that group related settings together. Subsections may contain further subsections or individual parameters.

Each parameter entry contains the following information:

• Name The identifier used in configuration files and on the command line.
• Default value The value used if the parameter is not explicitly specified.
• Description A short explanation describing the purpose and behavior of the parameter.
• Tags Additional metadata associated with the parameter.
• Restrictions Allowed value ranges for numeric parameters or valid options for string parameters.

Parameter tags provide additional information about how a parameter is used. Some tags indicate whether a parameter is required or intended for advanced configuration, while others may be used internally by OpenMS or workflow tools.

Parameters highlighted as required must be specified for the tool to run successfully. Parameters marked as advanced allow fine-tuning of algorithm behavior and are typically not needed for standard workflows.

+ProSEAnnotates bottom-up MS/MS spectra using ProSE.

version3.7.0-pre-nightly-2026-10-20 Version of the tool that generated this parameters file.

++1Instance '1' section for 'ProSE'

in[] Input spectrum file(s). Multiple files are searched against the same database; the fragment index is built once and reused.input file*.mzML, *.d, *.raw

database Input protein sequence database in FASTA format.input file*.fasta, *.fa, *.faa

out_idxml[] Output idXML identification file(s). Must have the same number of entries as -in.output file*.idXML

out_qpx Output directory for QPX exchange format Parquet files. Writes per-input .psm.parquet and .pg.parquet, plus merged quantms.psm.parquet and quantms.pg.parquet. The pg files are written only when protein groups were actually inferred, which needs 'FDR:protein' > 0 together with decoys, or '-out_merged' with more than one input; an identification-only run produces no pg file rather than an empty one.output dir

out_parquet Output directory for OpenMS internal format Parquet files. Writes per-input .psm/proteins/pg/search_params.parquet, plus merged openms.* files.output dir

out_merged Optional merged output file containing all PSMs pooled across input files with cross-file protein inference (BasicProteinInferenceAlgorithm) and optional picked-protein FDR (FDR:protein). Per-file outputs (-out_idxml / -out_qpx / -out_parquet) retain run-level information. Only useful with multiple -in files.output file*.idXML

out_pin[] Output Percolator input (.pin/.tsv) file(s) for external rescoring. Must have the same number of entries as -in. It holds the PSMs before the rescoring and before any FDR filter, with ProSE's own scores and all reported hits: 'Search:rescore' and 'Search:FDR:*' apply to the other outputs only.output file*.tsv

out_mod_analysis_dir Optional directory to write modification-analysis tables (delta-mass, PTM stats) when running in open-search mode. When set, per-file tables are written using each input file's basename and an additional aggregate table is written across all input files. Has no effect in closed-search mode.output dir

summary_out Optional YAML file capturing the end-of-search report (per-file identification statistics, shared configuration/database/index facts, timing and output manifest) for pipeline ingestion. The same information is printed to the command line unless -no_summary is set.output file*.yaml

no_summaryfalse Suppress the end-of-search report printed to the command line. The -summary_out YAML file (if requested) is still written.true, false

log Name of log file (created only when specified)

debug0 Sets the debug level

threads1 Sets the number of threads allowed to be used by the TOPP tool (0 = all available cores)

no_progressfalse Disables progress logging to command linetrue, false

forcefalse Overrides tool-specific checkstrue, false

testfalse Enables the test mode (needed for internal use only)true, false

+++Search

enzymeTrypsin The enzyme used for peptide digestion.glutamyl endopeptidase, Glu-C+P, elastase-trypsin-chymotrypsin, no cleavage, Clostripain/P, cyanogen-bromide, PepsinA + P, Alpha-lytic protease, 2-iodobenzoate, iodosobenzoate, staphylococcal protease/D, Arg-C, Arg-C/P, Chymotrypsin, Chymotrypsin/P, Trypsin/P, proline-endopeptidase/HKR, unspecific cleavage, V8-DE, CNBr, V8-E, Asp-N, proline endopeptidase, Formic_acid, Asp-N/B, Asp-N_ambic, Lys-C, Lys-N, Lys-C/P, PepsinA, TrypChymo, leukocyte elastase, Trypsin

decoysauto Decoy handling for target-decoy FDR. 'auto': ensure decoys are available — reuse decoys already present in the database (marker auto-detected, prefix or suffix) or generate them if none are found. 'generate': always (re)generate decoys from the target proteins (any pre-existing decoys are removed first to avoid decoy-of-decoy entries). 'ignore': search the target proteins only — any decoys present in the database are removed.auto, generate, ignore

decoy_prefixDECOY_ Accession prefix prepended to decoy proteins when ProSE generates them (modes 'auto' without existing decoys, and 'generate'). Pre-existing decoys in the database are detected automatically (any common marker, used as prefix or suffix) and do not require this setting.

low_memoryfalse Non-specific searches (peptide:enzyme_specificity=none; ignored otherwise): index the peptide masses, as the prefixes of one mother peptide per protein position, instead of the fragments of every peptidoform, and generate the fragments of the peptidoforms in the precursor window at query time. Finds the same candidates with a fraction of the memory (e.g. for immunopeptidomics against a human database), but takes more time per spectrum, the more the wider the precursor window.true, false

rescoretrue Rescore the PSMs of every search run (input file) in-process with Percolator (OpenMS' built-in implementation, as PercolatorAdapter uses by default) before the FDR filters: Percolator q-values become the main score (the SVM score and PEP are kept as meta values), only the best hit per spectrum is kept, and FDR:PSM and FDR:protein are applied to the rescored PSMs. Needs decoys (see 'decoys') and at least 100 PSMs: a run without them, or for which Percolator fails, is not rescored and keeps its search engine scores, which the FDR filters then use (the ProSE tool warns). Set to 'false' to report the search engine scores.true, false

++++precursorPrecursor (Parent Ion) Options. mass_tolerance_lower/_upper are positive magnitudes applied as [-lower, +upper] around the precursor mass.

mass_tolerance_lower10.0 Lower-side precursor-mass tolerance (positive magnitude; effective window is [-lower, +upper] around the precursor). When strongly asymmetric, also review precursor:isotope_error_min.0.0:∞

mass_tolerance_upper10.0 Upper-side precursor-mass tolerance (positive magnitude).0.0:∞

mass_tolerance_unitppm Unit of precursor mass tolerance.ppm, Da

min_charge2 Minimum precursor charge to be considered.

max_charge5 Maximum precursor charge to be considered.

isotope_error_min-1 Minimum precursor isotope error searched, in 13C spacings (1.00336 Da) added to the observed precursor mass: -1 finds a peptide whose first 13C isotope peak was selected as the precursor. The PSM meta value 'isotope_error' reports the opposite sign by default (see report:isotope_error_convention).

isotope_error_max1 Maximum precursor isotope error searched, with the sign of precursor:isotope_error_min: +1 finds a peptide whose precursor was selected one 13C spacing below its monoisotopic peak.

++++fragmentFragments (Product Ion) Options

mass_tolerance20.0 Fragment mass tolerance

mass_tolerance_unitppm Unit of fragment mppm, Da

deisotopeauto MS2 deisotoping (single-charge deconvolution) before searching. 'auto' deisotopes only when the fragment tolerance is within the high-resolution deisotoper range (<= 0.1 Da / <= 100 ppm) and skips it for low-resolution (e.g. ion-trap CID) data; 'true' always deisotopes (requires a high-resolution fragment tolerance); 'false' never deisotopes.auto, true, false

deisotope_min_peaks2 Minimum number of peaks, the monoisotopic peak included, of an isotope envelope that MS2 deisotoping collapses into its monoisotopic peak. With 2 (Sage-like), an ion whose M+2 peak is lost in the noise loses its M+1 peak too, so the M+1 peak no longer takes a place in the per-window peak quota, and a multiply charged ion seen with two isotope peaks is converted to charge 1; in dense spectra (e.g. timsTOF) more of the two-peak multiply charged envelopes are chance pairs. 3 is the earlier behaviour.2:10

deisotope_charge_capprecursor Fragment charges that MS2 deisotoping tries. 'precursor' tries charges up to the precursor charge, but at most 3 (1-3 when the precursor charge is unknown): a fragment cannot carry more charges than its precursor, so a chance peak 1/3 Th above an ion of a 2+ precursor cannot turn the ion into a '3+' envelope at a wrong m/z. This is Sage-like; Sage caps at the precursor charge without the limit of 3 and counts an unknown charge as 3. 'none' tries charges 1-3 in every spectrum (the earlier behaviour).precursor, none

deisotope_sum_intensitytrue Give the monoisotopic peak of each isotope envelope the summed intensity of the envelope (Sage-like). 'false' keeps the monoisotopic peak's own intensity (the earlier behaviour).true, false

min_mz150 Minimal fragment mz for database

max_mz2000 Maximal fragment mz for database

min_ion_index2 Ions with index less than or equal to this value are not added to the fragment index (use 0 to include all ions; 2 skips b1/b2/y1/y2). Low-index ions are often noisy and unreliable.0:∞

query_spectrumauto Spectrum used for candidate retrieval. 'raw' queries the fragment index with all positive-intensity peaks, before deisotoping and local/top-N filtering, so that spectra whose matching fragments are not among the retained peaks still get candidates; it costs an additional peak list per spectrum and more fragment matches. 'processed' queries with the scoring peak list. 'auto' uses 'raw' for high-resolution fragments (<= 0.1 Da / <= 100 ppm) and 'processed' otherwise: at low resolution, the unfiltered peaks match many random fragments and crowd out the correct candidates. Scoring always uses the processed spectrum.auto, raw, processed

min_matched_ions5 Minimal number of matched ions to report a PSM

max_charge2 max fragment charge

++++peaks

keep_n0 Maximum number of MS2 peaks kept per spectrum (NLargest) before scoring. 0 = auto: a resolution-aware cap (~400 for high-res, ~80 at 0.5 Da, floor 60) that avoids the spurious low-resolution fragment matching which otherwise inflates HyperScore for targets and decoys alike. Set an explicit value to override (e.g. 400 for the legacy behavior).0:∞

window_top20 Maximum number of MS2 peaks kept per 100 Da window (WindowMower) before scoring.1:∞

window_typeauto Local peak filtering. 'auto' uses jump_full for high-resolution fragments (<= 0.1 Da / <= 100 ppm), preserving the strongest peaks even in a short final 100 Da window, and legacy jump filtering otherwise. 'jump' scales the last window's peak quota by its observed width; 'jump_full' keeps the full quota in every window.auto, jump, jump_full

++++modificationsModifications Options

fixed[Carbamidomethyl (C)] Fixed modifications, specified using UniMod (www.unimod.org) terms, e.g. 'Carbamidomethyl (C)'15N-oxobutanoic (N-term C), 15N-oxobutanoic (Protein N-term S), 15N-oxobutanoic (Protein N-term T), 2-dimethylsuccinyl (C), 2-methylbutyryl (K), 2-monomethylsuccinyl (C), 2-nitrobenzyl (Y), 2-succinyl (C), 2HPG (R), 2PCA-triazole-ethanethiol (N-term), 3-deoxyglucosone (R), 3-hydroxy-3-methylglutaryl (K), 3-hydroxybenzyl-phosphate (K), 3-hydroxybenzyl-phosphate (S), 3-hydroxybenzyl-phosphate (T), 3-hydroxybenzyl-phosphate (Y), 3-methylglutaconyl (K), 3-methylglutaryl (K), 3-phosphoglyceryl (K), 3sulfo (N-term), 4-ONE (C), 4-ONE (H), 4-ONE (K), 4-ONE+Delta:H(-2)O(-1) (C), 4-ONE+Delta:H(-2)O(-1) (H), 4-ONE+Delta:H(-2)O(-1) (K), 4AcAllylGal (C), 6C-CysPAT (C), 6C-CysPAT (D), 6C-CysPAT (E), 6C-CysPAT (H), 6C-CysPAT (K), 6C-CysPAT (N-term), 6C-CysPAT (S), 6C-CysPAT (T), 6C-CysPAT (Y), a-type-ion (C-term), AccQTag (K), AccQTag (N-term), Acetoacetyl (K), Acetyl (C), Acetyl (H), Acetyl (K), Acetyl (N-term), Acetyl (Protein N-term), Acetyl (R), Acetyl (S), Acetyl (T), Acetyl (Y), Acetyl:13C(2) (K), Acetyl:13C(2) (Protein N-term), Acetyl:2H(3) (H), Acetyl:2H(3) (K), Acetyl:2H(3) (N-term), Acetyl:2H(3) (Protein N-term), Acetyl:2H(3) (S), Acetyl:2H(3) (T), Acetyl:2H(3) (Y), Acetyldeoxyhypusine (K), Acetylhypusine (K), ADP-Ribosyl (C), ADP-Ribosyl (D), ADP-Ribosyl (E), ADP-Ribosyl (K), ADP-Ribosyl (N), ADP-Ribosyl (R), ADP-Ribosyl (S), ADP-Ribosyl (T), AEBS (H), AEBS (K), AEBS (Protein N-term), AEBS (S), AEBS (Y), AEC-MAEC (S), AEC-MAEC (T), AEC-MAEC:2H(4) (S), AEC-MAEC:2H(4) (T), AFB1_Dialdehyde (K), AHA-Alkyne (M), AHA-Alkyne-KDDDD (M), AHA-SS (M), AHA-SS_CAM (M), Ahx2+Hsl (C-term), Ala->Arg (A), Ala->Asn (A), Ala->Asp (A), Ala->Cys (A), Ala->Gln (A), Ala->Glu (A), Ala->Gly (A), Ala->His (A), Ala->Lys (A), Ala->Met (A), Ala->Phe (A), Ala->Pro (A), Ala->Ser (A), Ala->Thr (A), Ala->Trp (A), Ala->Tyr (A), Ala->Val (A), Ala->Xle (A), Amidated (C-term), Amidated (Protein C-term), Amidine (K), Amidine (N-term), Amidino (C), Amino (Y), Ammonia-loss (N), Ammonia-loss (N-term C), Ammonia-loss (Protein N-term S), Ammonia-loss (Protein N-term T), Ammonium (C-term), Ammonium (D), Ammonium (E), AMTzHexNAc2 (N), AMTzHexNAc2 (S), AMTzHexNAc2 (T), Andro-H2O (C), Archaeol (C), Arg (N-term), Arg->Ala (R), Arg->Asn (R), Arg->Asp (R), Arg->Cys (R), Arg->Gln (R), Arg->Glu (R), Arg->GluSA (R), Arg->Gly (R), Arg->His (R), Arg->Lys (R), Arg->Met (R), Arg->Npo (R), Arg->Orn (R), Arg->Phe (R), Arg->Pro (R), Arg->Ser (R), Arg->Thr (R), Arg->Trp (R), Arg->Tyr (R), Arg->Val (R), Arg->Xle (R), Arg-loss (C-term R), Arg2PG (R), Argbiotinhydrazide (R), AROD (C), Asn->Ala (N), Asn->Arg (N), Asn->Asp (N), Asn->Cys (N), Asn->Gln (N), Asn->Glu (N), Asn->Gly (N), Asn->His (N), Asn->Lys (N), Asn->Met (N), Asn->Phe (N), Asn->Pro (N), Asn->Ser (N), Asn->Thr (N), Asn->Trp (N), Asn->Tyr (N), Asn->Val (N), Asn->Xle (N), Asp->Ala (D), Asp->Arg (D), Asp->Asn (D), Asp->Cys (D), Asp->Gln (D), Asp->Glu (D), Asp->Gly (D), Asp->His (D), Asp->Lys (D), Asp->Met (D), Asp->Phe (D), Asp->Pro (D), Asp->Ser (D), Asp->Thr (D), Asp->Trp (D), Asp->Tyr (D), Asp->Val (D), Asp->Xle (D), Aspartylurea (H), Atto495Maleimide (C), AzidoF (F), azole (C), azole (S), Bacillosamine (N), BADGE (C), BDMAPP (H), BDMAPP (K), BDMAPP (Protein N-term), BDMAPP (W), BDMAPP (Y), BEMAD_C (C), BEMAD_C:2H(6) (C), BEMAD_ST (S), BEMAD_ST (T), BEMAD_ST:2H(6) (S), BEMAD_ST:2H(6) (T), Benzoyl (K), Benzoyl (N-term), benzylguanidine (K), betaFNA (C), betaFNA (K), BHT (C), BHT (H), BHT (K), BHTOH (C), BHTOH (H), BHTOH (K), Biotin (K), Biotin (N-term), Biotin-HPDP (C), Biotin-PEG-PRA (M), Biotin-PEO-Amine (D), Biotin-PEO-Amine (E), Biotin-PEO-Amine (Protein C-term), Biotin-phenacyl (C), Biotin-phenacyl (H), Biotin-phenacyl (S), Biotin-tyramide (C), Biotin-tyramide (W), Biotin-tyramide (Y), Biotin:Aha-DADPS (M), Biotin:Aha-PC (M), Biotin:Cayman-10013 (C), Biotin:Cayman-10141 (C), Biotin:Invitrogen-M1602 (C), Biotin:Sigma-B1267 (C), Biotin:Thermo-21325 (K), Biotin:Thermo-21328 (K), Biotin:Thermo-21328 (N-term), Biotin:Thermo-21330 (K), Biotin:Thermo-21330 (N-term), Biotin:Thermo-21345 (Q), Biotin:Thermo-21360 (X), Biotin:Thermo-21901+2H2O (C), Biotin:Thermo-21901+H2O (C), Biotin:Thermo-21911 (C), Biotin:Thermo-33033 (X), Biotin:Thermo-33033-H (X), Biotin:Thermo-88310 (K), Biotin:Thermo-88317 (S), Biotin:Thermo-88317 (Y), biotinAcrolein298 (C), biotinAcrolein298 (H), biotinAcrolein298 (K), biotinAcrolein298 (Protein N-term), BisANS (K), bisANS-sulfonates (K), bisANS-sulfonates (S), bisANS-sulfonates (T), BITC (C), BITC (K), BITC (N-term), BMP-piperidinol (C), BMP-piperidinol (M), Brij35 (N-term), Brij58 (N-term), Bromo (F), Bromo (H), Bromo (W), Bromo (Y), Bromobimane (C), Butyryl (K), C8-QAT (K), C8-QAT (N-term), CAF (N-term), CAMthiopropanoyl (K), CAMthiopropanoyl (Protein N-term), Can-FP-biotin (S), Can-FP-biotin (T), Can-FP-biotin (Y), Carbamidomethyl (C), Carbamidomethyl (D), Carbamidomethyl (E), Carbamidomethyl (H), Carbamidomethyl (K), Carbamidomethyl (M), Carbamidomethyl (N-term), Carbamidomethyl (S), Carbamidomethyl (T), Carbamidomethyl (U), Carbamidomethyl (Y), CarbamidomethylDTT (C), Carbamyl (C), Carbamyl (K), Carbamyl (M), Carbamyl (N-term), Carbamyl (Protein N-term), Carbamyl (R), Carbamyl (S), Carbamyl (T), Carbamyl (Y), Carbofuran (S), Carbonyl (A), Carbonyl (E), Carbonyl (I), Carbonyl (L), Carbonyl (Q), Carbonyl (R), Carbonyl (S), Carbonyl (V), Carboxy (D), Carboxy (E), Carboxy (K), Carboxy (Protein N-term M), Carboxy (W), Carboxy->Thiocarboxy (Protein C-term G), Carboxyethyl (H), Carboxyethyl (K), Carboxyethylpyrrole (K), Carboxymethyl (C), Carboxymethyl (K), Carboxymethyl (N-term), Carboxymethyl (U), Carboxymethyl (W), Carboxymethyl:13C(2) (C), CarboxymethylDMAP (N-term), CarboxymethylDTT (C), Cation:Ag (C-term), Cation:Ag (D), Cation:Ag (E), Cation:Al[III] (C-term), Cation:Al[III] (D), Cation:Al[III] (E), Cation:Ca[II] (C-term), Cation:Ca[II] (D), Cation:Ca[II] (E), Cation:Cu[I] (C-term), Cation:Cu[I] (D), Cation:Cu[I] (E), Cation:Cu[I] (H), Cation:Fe[II] (C-term), Cation:Fe[II] (D), Cation:Fe[II] (E), Cation:Fe[III] (C-term), Cation:Fe[III] (D), Cation:Fe[III] (E), Cation:K (C-term), Cation:K (D), Cation:K (E), Cation:Li (C-term), Cation:Li (D), Cation:Li (E), Cation:Mg[II] (C-term), Cation:Mg[II] (D), Cation:Mg[II] (E), Cation:Na (C-term), Cation:Na (D), Cation:Na (E), Cation:Ni[II] (C-term), Cation:Ni[II] (D), Cation:Ni[II] (E), Cation:Zn[II] (C-term), Cation:Zn[II] (D), Cation:Zn[II] (E), Cation:Zn[II] (H), cGMP (C), cGMP (S), cGMP+RMP-loss (C), cGMP+RMP-loss (S), CHDH (D), Chlorination (W), Chlorination (Y), Cholesterol (Protein C-term), CIGG (K), CLIP_TRAQ_2 (K), CLIP_TRAQ_2 (N-term), CLIP_TRAQ_2 (Y), CLIP_TRAQ_3 (K), CLIP_TRAQ_3 (N-term), CLIP_TRAQ_3 (Y), CLIP_TRAQ_4 (K), CLIP_TRAQ_4 (N-term), CLIP_TRAQ_4 (Y), CoenzymeA (C), Cresylphosphate (H), Cresylphosphate (K), Cresylphosphate (R), Cresylphosphate (S), Cresylphosphate (T), Cresylphosphate (Y), CresylSaligeninPhosphate (H), CresylSaligeninPhosphate (K), CresylSaligeninPhosphate (R), CresylSaligeninPhosphate (S), CresylSaligeninPhosphate (T), CresylSaligeninPhosphate (Y), Crotonaldehyde (C), Crotonaldehyde (H), Crotonaldehyde (K), Crotonyl (K), CuSMo (C), CUSTOM0 (A), CUSTOM0 (C), CUSTOM0 (C-term), CUSTOM0 (D), CUSTOM0 (E), CUSTOM0 (F), CUSTOM0 (G), CUSTOM0 (H), CUSTOM0 (I), CUSTOM0 (K), CUSTOM0 (L), CUSTOM0 (M), CUSTOM0 (N), CUSTOM0 (N-term), CUSTOM0 (P), CUSTOM0 (Q), CUSTOM0 (R), CUSTOM0 (S), CUSTOM0 (T), CUSTOM0 (V), CUSTOM0 (W), CUSTOM0 (Y), CUSTOM1 (A), CUSTOM1 (C), CUSTOM1 (C-term), CUSTOM1 (D), CUSTOM1 (E), CUSTOM1 (F), CUSTOM1 (G), CUSTOM1 (H), CUSTOM1 (I), CUSTOM1 (K), CUSTOM1 (L), CUSTOM1 (M), CUSTOM1 (N), CUSTOM1 (N-term), CUSTOM1 (P), CUSTOM1 (Q), CUSTOM1 (R), CUSTOM1 (S), CUSTOM1 (T), CUSTOM1 (V), CUSTOM1 (W), CUSTOM1 (Y), CUSTOM2 (A), CUSTOM2 (C), CUSTOM2 (C-term), CUSTOM2 (D), CUSTOM2 (E), CUSTOM2 (F), CUSTOM2 (G), CUSTOM2 (H), CUSTOM2 (I), CUSTOM2 (K), CUSTOM2 (L), CUSTOM2 (M), CUSTOM2 (N), CUSTOM2 (N-term), CUSTOM2 (P), CUSTOM2 (Q), CUSTOM2 (R), CUSTOM2 (S), CUSTOM2 (T), CUSTOM2 (V), CUSTOM2 (W), CUSTOM2 (Y), CUSTOM3 (A), CUSTOM3 (C), CUSTOM3 (C-term), CUSTOM3 (D), CUSTOM3 (E), CUSTOM3 (F), CUSTOM3 (G), CUSTOM3 (H), CUSTOM3 (I), CUSTOM3 (K), CUSTOM3 (L), CUSTOM3 (M), CUSTOM3 (N), CUSTOM3 (N-term), CUSTOM3 (P), CUSTOM3 (Q), CUSTOM3 (R), CUSTOM3 (S), CUSTOM3 (T), CUSTOM3 (V), CUSTOM3 (W), CUSTOM3 (Y), CUSTOM4 (A), CUSTOM4 (C), CUSTOM4 (C-term), CUSTOM4 (D), CUSTOM4 (E), CUSTOM4 (F), CUSTOM4 (G), CUSTOM4 (H), CUSTOM4 (I), CUSTOM4 (K), CUSTOM4 (L), CUSTOM4 (M), CUSTOM4 (N), CUSTOM4 (N-term), CUSTOM4 (P), CUSTOM4 (Q), CUSTOM4 (R), CUSTOM4 (S), CUSTOM4 (T), CUSTOM4 (V), CUSTOM4 (W), CUSTOM4 (Y), CUSTOM5 (A), CUSTOM5 (C), CUSTOM5 (C-term), CUSTOM5 (D), CUSTOM5 (E), CUSTOM5 (F), CUSTOM5 (G), CUSTOM5 (H), CUSTOM5 (I), CUSTOM5 (K), CUSTOM5 (L), CUSTOM5 (M), CUSTOM5 (N), CUSTOM5 (N-term), CUSTOM5 (P), CUSTOM5 (Q), CUSTOM5 (R), CUSTOM5 (S), CUSTOM5 (T), CUSTOM5 (V), CUSTOM5 (W), CUSTOM5 (Y), CUSTOM6 (A), CUSTOM6 (C), CUSTOM6 (C-term), CUSTOM6 (D), CUSTOM6 (E), CUSTOM6 (F), CUSTOM6 (G), CUSTOM6 (H), CUSTOM6 (I), CUSTOM6 (K), CUSTOM6 (L), CUSTOM6 (M), CUSTOM6 (N), CUSTOM6 (N-term), CUSTOM6 (P), CUSTOM6 (Q), CUSTOM6 (R), CUSTOM6 (S), CUSTOM6 (T), CUSTOM6 (V), CUSTOM6 (W), CUSTOM6 (Y), CUSTOM7 (A), CUSTOM7 (C), CUSTOM7 (C-term), CUSTOM7 (D), CUSTOM7 (E), CUSTOM7 (F), CUSTOM7 (G), CUSTOM7 (H), CUSTOM7 (I), CUSTOM7 (K), CUSTOM7 (L), CUSTOM7 (M), CUSTOM7 (N), CUSTOM7 (N-term), CUSTOM7 (P), CUSTOM7 (Q), CUSTOM7 (R), CUSTOM7 (S), CUSTOM7 (T), CUSTOM7 (V), CUSTOM7 (W), CUSTOM7 (Y), CUSTOM8 (A), CUSTOM8 (C), CUSTOM8 (C-term), CUSTOM8 (D), CUSTOM8 (E), CUSTOM8 (F), CUSTOM8 (G), CUSTOM8 (H), CUSTOM8 (I), CUSTOM8 (K), CUSTOM8 (L), CUSTOM8 (M), CUSTOM8 (N), CUSTOM8 (N-term), CUSTOM8 (P), CUSTOM8 (Q), CUSTOM8 (R), CUSTOM8 (S), CUSTOM8 (T), CUSTOM8 (V), CUSTOM8 (W), CUSTOM8 (Y), CUSTOM9 (A), CUSTOM9 (C), CUSTOM9 (C-term), CUSTOM9 (D), CUSTOM9 (E), CUSTOM9 (F), CUSTOM9 (G), CUSTOM9 (H), CUSTOM9 (I), CUSTOM9 (K), CUSTOM9 (L), CUSTOM9 (M), CUSTOM9 (N), CUSTOM9 (N-term), CUSTOM9 (P), CUSTOM9 (Q), CUSTOM9 (R), CUSTOM9 (S), CUSTOM9 (T), CUSTOM9 (V), CUSTOM9 (W), CUSTOM9 (Y), Cy3-maleimide (C), Cy3b-maleimide (C), Cyano (C), CyDye-Cy3 (C), CyDye-Cy5 (C), Cys->Ala (C), Cys->Arg (C), Cys->Asn (C), Cys->Asp (C), Cys->CamSec (C), Cys->Dha (C), Cys->ethylaminoAla (C), Cys->Gln (C), Cys->Glu (C), Cys->Gly (C), Cys->His (C), Cys->Lys (C), Cys->Met (C), Cys->methylaminoAla (C), Cys->Oxoalanine (C), Cys->Phe (C), Cys->Pro (C), Cys->PyruvicAcid (Protein N-term C), Cys->SecNEM (C), Cys->SecNEM:2H(5) (C), Cys->Ser (C), Cys->Thr (C), Cys->Trp (C), Cys->Tyr (C), Cys->Val (C), Cys->Xle (C), Cysteinyl (C), cysTMT (C), cysTMT6plex (C), Cytopiloyne (C), Cytopiloyne (K), Cytopiloyne (N-term), Cytopiloyne (P), Cytopiloyne (R), Cytopiloyne (S), Cytopiloyne (Y), Cytopiloyne+water (C), Cytopiloyne+water (K), Cytopiloyne+water (N-term), Cytopiloyne+water (R), Cytopiloyne+water (S), Cytopiloyne+water (T), Cytopiloyne+water (Y), DABCYL-C2-maleimide (C), DABCYL-C2-maleimide (K), DAET (S), DAET (T), Dansyl (K), Dansyl (N-term), Dap-DSP (A), Dap-DSP (E), Dap-DSP (K), DBIA (C), DCP (C), Deamidated (N), Deamidated (Protein N-term F), Deamidated (Q), Deamidated (R), Deamidated:18O(1) (N), Deamidated:18O(1) (Q), Decanoyl (S), Decanoyl (T), Decarboxylation (D), Decarboxylation (E), DEDGFLYMVYASQETFG (K), Dehydrated (D), Dehydrated (N-term C), Dehydrated (Protein C-term N), Dehydrated (Protein C-term Q), Dehydrated (S), Dehydrated (T), Dehydrated (Y), Dehydro (C), Delta:H(-1)N(-1)18O(1) (N), Delta:H(-4)O(2) (W), Delta:H(-4)O(3) (W), Delta:H(10)C(8)O(1) (K), Delta:H(2)C(2) (H), Delta:H(2)C(2) (K), Delta:H(2)C(2) (N-term), Delta:H(2)C(2) (Protein N-term), Delta:H(2)C(3) (K), Delta:H(2)C(3)O(1) (K), Delta:H(2)C(3)O(1) (R), Delta:H(2)C(5) (K), Delta:H(4)C(2) (H), Delta:H(4)C(2) (K), Delta:H(4)C(2) (N-term), Delta:H(4)C(2)O(-1)S(1) (S), Delta:H(4)C(3) (H), Delta:H(4)C(3) (K), Delta:H(4)C(3) (Protein N-term), Delta:H(4)C(3)O(1) (C), Delta:H(4)C(3)O(1) (H), Delta:H(4)C(3)O(1) (K), Delta:H(4)C(3)O(1) (R), Delta:H(4)C(3)O(2) (K), Delta:H(4)C(5)O(1) (R), Delta:H(4)C(6) (K), Delta:H(5)C(2) (P), Delta:H(6)C(3)O(1) (C), Delta:H(6)C(3)O(1) (H), Delta:H(6)C(3)O(1) (K), Delta:H(6)C(3)O(1) (Protein N-term), Delta:H(6)C(6)O(1) (K), Delta:H(6)C(7)O(4) (R), Delta:H(8)C(6)O(1) (K), Delta:H(8)C(6)O(1) (Protein N-term), Delta:H(8)C(6)O(2) (K), Delta:Hg(1) (C), Delta:O(4) (W), Delta:S(-1)Se(1) (C), Delta:S(-1)Se(1) (M), Delta:Se(1) (C), Deoxy (D), Deoxy (S), Deoxy (T), Deoxyhypusine (K), Deoxyhypusine (Q), DeStreak (C), Dethiomethyl (M), dHex (N), dHex (S), dHex (T), dHex(1)Hex(1) (S), dHex(1)Hex(1) (T), dHex(1)Hex(1)HexA(1)HexNAc(3) (S), dHex(1)Hex(1)HexA(1)HexNAc(3) (T), dHex(1)Hex(1)HexNAc(1)Kdn(1) (S), dHex(1)Hex(1)HexNAc(1)Kdn(1) (T), dHex(1)Hex(1)HexNAc(1)NeuAc(1) (S), dHex(1)Hex(1)HexNAc(1)NeuAc(1) (T), dHex(1)Hex(1)HexNAc(1)NeuGc(1) (S), dHex(1)Hex(1)HexNAc(1)NeuGc(1) (T), dHex(1)Hex(1)HexNAc(2)Kdn(1) (S), dHex(1)Hex(1)HexNAc(2)Kdn(1) (T), dHex(1)Hex(1)HexNAc(2)NeuAc(1) (S), dHex(1)Hex(1)HexNAc(2)NeuAc(1) (T), dHex(1)Hex(1)HexNAc(2)NeuAc(1)Sulf(1) (S), dHex(1)Hex(1)HexNAc(2)NeuAc(1)Sulf(1) (T), dHex(1)Hex(1)HexNAc(2)NeuAc(2) (S), dHex(1)Hex(1)HexNAc(2)NeuAc(2) (T), dHex(1)Hex(1)HexNAc(2)Sulf(1) (S), dHex(1)Hex(1)HexNAc(2)Sulf(1) (T), dHex(1)Hex(1)HexNAc(3) (S), dHex(1)Hex(1)HexNAc(3) (T), dHex(1)Hex(1)HexNAc(3)NeuAc(1) (S), dHex(1)Hex(1)HexNAc(3)NeuAc(1) (T), dHex(1)Hex(1)HexNAc(3)NeuAc(1)Sulf(1) (S), dHex(1)Hex(1)HexNAc(3)NeuAc(1)Sulf(1) (T), dHex(1)Hex(1)HexNAc(3)NeuGc(1) (S), dHex(1)Hex(1)HexNAc(3)NeuGc(1) (T), dHex(1)Hex(1)HexNAc(3)Sulf(1) (S), dHex(1)Hex(1)HexNAc(3)Sulf(1) (T), dHex(1)Hex(1)HexNAc(4) (S), dHex(1)Hex(1)HexNAc(4) (T), dHex(1)Hex(2) (S), dHex(1)Hex(2) (T), dHex(1)Hex(2)HexA(1) (S), dHex(1)Hex(2)HexA(1) (T), dHex(1)Hex(2)HexA(1)HexNAc(1) (S), dHex(1)Hex(2)HexA(1)HexNAc(1) (T), dHex(1)Hex(2)HexA(1)HexNAc(1)Sulf(1) (S), dHex(1)Hex(2)HexA(1)HexNAc(1)Sulf(1) (T), dHex(1)Hex(2)HexA(1)HexNAc(2) (S), dHex(1)Hex(2)HexA(1)HexNAc(2) (T), dHex(1)Hex(2)HexNAc(1) (S), dHex(1)Hex(2)HexNAc(1) (T), dHex(1)Hex(2)HexNAc(1)NeuAc(2) (S), dHex(1)Hex(2)HexNAc(1)NeuAc(2) (T), dHex(1)Hex(2)HexNAc(1)Sulf(1) (S), dHex(1)Hex(2)HexNAc(1)Sulf(1) (T), dHex(1)Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (S), dHex(1)Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (T), dHex(1)Hex(2)HexNAc(2)NeuAc(2) (S), dHex(1)Hex(2)HexNAc(2)NeuAc(2) (T), dHex(1)Hex(2)HexNAc(2)NeuAc(2)Sulf(1) (S), dHex(1)Hex(2)HexNAc(2)NeuAc(2)Sulf(1) (T), dHex(1)Hex(2)HexNAc(2)NeuGc(1) (N), dHex(1)Hex(2)HexNAc(2)NeuGc(1) (S), dHex(1)Hex(2)HexNAc(2)NeuGc(1) (T), dHex(1)Hex(2)HexNAc(2)NeuGc(2) (S), dHex(1)Hex(2)HexNAc(2)NeuGc(2) (T), dHex(1)Hex(2)HexNAc(2)NeuGc(3) (S), dHex(1)Hex(2)HexNAc(2)NeuGc(3) (T), dHex(1)Hex(2)HexNAc(2)Pent(1) (N), dHex(1)Hex(2)HexNAc(2)Sulf(1) (S), dHex(1)Hex(2)HexNAc(2)Sulf(1) (T), dHex(1)Hex(2)HexNAc(3) (N), dHex(1)Hex(2)HexNAc(3) (S), dHex(1)Hex(2)HexNAc(3) (T), dHex(1)Hex(2)HexNAc(3)NeuAc(1) (S), dHex(1)Hex(2)HexNAc(3)NeuAc(1) (T), dHex(1)Hex(2)HexNAc(3)NeuAc(1)Sulf(1) (S), dHex(1)Hex(2)HexNAc(3)NeuAc(1)Sulf(1) (T), dHex(1)Hex(2)HexNAc(3)Sulf(1) (S), dHex(1)Hex(2)HexNAc(3)Sulf(1) (T), dHex(1)Hex(2)HexNAc(4) (N), dHex(1)Hex(2)HexNAc(4) (S), dHex(1)Hex(2)HexNAc(4) (T), dHex(1)Hex(2)HexNAc(4)NeuAc(1) (S), dHex(1)Hex(2)HexNAc(4)NeuAc(1) (T), dHex(1)Hex(2)HexNAc(4)NeuAc(2) (S), dHex(1)Hex(2)HexNAc(4)NeuAc(2) (T), dHex(1)Hex(2)HexNAc(4)Sulf(2) (S), dHex(1)Hex(2)HexNAc(4)Sulf(2) (T), dHex(1)Hex(3) (S), dHex(1)Hex(3) (T), dHex(1)Hex(3)HexA(1)HexNAc(1) (S), dHex(1)Hex(3)HexA(1)HexNAc(1) (T), dHex(1)Hex(3)HexA(1)HexNAc(1)Sulf(1) (S), dHex(1)Hex(3)HexA(1)HexNAc(1)Sulf(1) (T), dHex(1)Hex(3)HexA(1)HexNAc(2) (S), dHex(1)Hex(3)HexA(1)HexNAc(2) (T), dHex(1)Hex(3)HexA(1)HexNAc(2)Sulf(1) (S), dHex(1)Hex(3)HexA(1)HexNAc(2)Sulf(1) (T), dHex(1)Hex(3)HexA(1)HexNAc(3)Sulf(1) (S), dHex(1)Hex(3)HexA(1)HexNAc(3)Sulf(1) (T), dHex(1)Hex(3)HexA(2)HexNAc(2) (S), dHex(1)Hex(3)HexA(2)HexNAc(2) (T), dHex(1)Hex(3)HexNAc(1) (S), dHex(1)Hex(3)HexNAc(1) (T), dHex(1)Hex(3)HexNAc(1)Sulf(1) (S), dHex(1)Hex(3)HexNAc(1)Sulf(1) (T), dHex(1)Hex(3)HexNAc(2) (N), dHex(1)Hex(3)HexNAc(2) (S), dHex(1)Hex(3)HexNAc(2) (T), dHex(1)Hex(3)HexNAc(2)NeuGc(1) (S), dHex(1)Hex(3)HexNAc(2)NeuGc(1) (T), dHex(1)Hex(3)HexNAc(2)Pent(1) (N), dHex(1)Hex(3)HexNAc(2)Sulf(1) (N), dHex(1)Hex(3)HexNAc(2)Sulf(1) (S), dHex(1)Hex(3)HexNAc(2)Sulf(1) (T), dHex(1)Hex(3)HexNAc(3) (N), dHex(1)Hex(3)HexNAc(3) (S), dHex(1)Hex(3)HexNAc(3) (T), dHex(1)Hex(3)HexNAc(3)NeuAc(2) (S), dHex(1)Hex(3)HexNAc(3)NeuAc(2) (T), dHex(1)Hex(3)HexNAc(3)Pent(1) (N), dHex(1)Hex(3)HexNAc(3)Pent(2) (N), dHex(1)Hex(3)HexNAc(3)Pent(3) (N), dHex(1)Hex(3)HexNAc(3)Sulf(1) (S), dHex(1)Hex(3)HexNAc(3)Sulf(1) (T), dHex(1)Hex(3)HexNAc(4) (N), dHex(1)Hex(3)HexNAc(4) (S), dHex(1)Hex(3)HexNAc(4) (T), dHex(1)Hex(3)HexNAc(4)NeuAc(1) (N), dHex(1)Hex(3)HexNAc(4)Pent(1) (N), dHex(1)Hex(3)HexNAc(4)Pent(2) (N), dHex(1)Hex(3)HexNAc(4)Pent(3) (N), dHex(1)Hex(3)HexNAc(4)Sulf(1) (N), dHex(1)Hex(3)HexNAc(5) (N), dHex(1)Hex(3)HexNAc(5) (S), dHex(1)Hex(3)HexNAc(5) (T), dHex(1)Hex(3)HexNAc(5)NeuAc(1) (N), dHex(1)Hex(3)HexNAc(5)NeuAc(1) (S), dHex(1)Hex(3)HexNAc(5)NeuAc(1) (T), dHex(1)Hex(3)HexNAc(5)Sulf(1) (N), dHex(1)Hex(3)HexNAc(6) (N), dHex(1)Hex(3)HexNAc(6) (S), dHex(1)Hex(3)HexNAc(6) (T), dHex(1)Hex(3)HexNAc(6)Sulf(1) (N), dHex(1)Hex(4) (S), dHex(1)Hex(4) (T), dHex(1)Hex(4)HexA(1) (S), dHex(1)Hex(4)HexA(1) (T), dHex(1)Hex(4)HexA(1)HexNAc(2) (S), dHex(1)Hex(4)HexA(1)HexNAc(2) (T), dHex(1)Hex(4)HexA(1)HexNAc(3)Sulf(1) (S), dHex(1)Hex(4)HexA(1)HexNAc(3)Sulf(1) (T), dHex(1)Hex(4)HexNAc(1)Pent(1) (N), dHex(1)Hex(4)HexNAc(2) (N), dHex(1)Hex(4)HexNAc(2) (S), dHex(1)Hex(4)HexNAc(2) (T), dHex(1)Hex(4)HexNAc(2)Pent(1) (N), dHex(1)Hex(4)HexNAc(3) (N), dHex(1)Hex(4)HexNAc(3)NeuAc(1) (N), dHex(1)Hex(4)HexNAc(3)NeuAc(1) (S), dHex(1)Hex(4)HexNAc(3)NeuAc(1) (T), dHex(1)Hex(4)HexNAc(3)NeuAc(1)Sulf(1) (N), dHex(1)Hex(4)HexNAc(3)NeuGc(1) (N), dHex(1)Hex(4)HexNAc(3)Pent(1) (N), dHex(1)Hex(4)HexNAc(3)Sulf(1) (N), dHex(1)Hex(4)HexNAc(4) (N), dHex(1)Hex(4)HexNAc(4) (S), dHex(1)Hex(4)HexNAc(4) (T), dHex(1)Hex(4)HexNAc(4)NeuAc(1) (N), dHex(1)Hex(4)HexNAc(4)NeuAc(1) (S), dHex(1)Hex(4)HexNAc(4)NeuAc(1) (T), dHex(1)Hex(4)HexNAc(4)NeuAc(1)Sulf(1) (N), dHex(1)Hex(4)HexNAc(4)Pent(1) (N), dHex(1)Hex(4)HexNAc(4)Sulf(1) (N), dHex(1)Hex(4)HexNAc(5) (N), dHex(1)Hex(4)HexNAc(5)Sulf(1) (N), dHex(1)Hex(5) (S), dHex(1)Hex(5) (T), dHex(1)Hex(5)HexA(1)HexNAc(3)Sulf(1) (N), dHex(1)Hex(5)HexA(1)HexNAc(3)Sulf(2) (N), dHex(1)Hex(5)HexNAc(2) (N), dHex(1)Hex(5)HexNAc(2)Pent(1) (N), dHex(1)Hex(5)HexNAc(3) (N), dHex(1)Hex(5)HexNAc(3)NeuAc(1) (N), dHex(1)Hex(5)HexNAc(3)NeuAc(1)Sulf(1) (N), dHex(1)Hex(5)HexNAc(3)NeuGc(1) (N), dHex(1)Hex(5)HexNAc(3)NeuGc(1)Sulf(1) (N), dHex(1)Hex(5)HexNAc(3)Sulf(1) (N), dHex(1)Hex(5)HexNAc(4) (N), dHex(1)Hex(5)HexNAc(4)Me(2)Pent(1) (N), dHex(1)Hex(5)HexNAc(4)NeuAc(1) (N), dHex(1)Hex(5)HexNAc(4)NeuAc(2) (N), dHex(1)Hex(5)HexNAc(4)Pent(1) (N), dHex(1)Hex(5)HexNAc(4)Sulf(1) (N), dHex(1)Hex(5)HexNAc(4)Sulf(2) (N), dHex(1)Hex(5)HexNAc(5) (N), dHex(1)Hex(6) (S), dHex(1)Hex(6) (T), dHex(1)Hex(6)HexNAc(2) (N), dHex(1)Hex(6)HexNAc(3) (N), dHex(1)Hex(6)HexNAc(3)Sulf(1) (N), dHex(1)Hex(6)HexNAc(4) (N), dHex(1)Hex(7)HexNAc(2) (N), dHex(1)Hex(7)HexNAc(3) (N), dHex(1)Hex(7)HexNAc(3)Phos(1) (N), dHex(1)Hex(7)HexNAc(3)Sulf(1) (N), dHex(1)Hex(7)HexNAc(4) (N), dHex(1)Hex(8)HexNAc(2) (N), dHex(1)HexNAc(3) (S), dHex(1)HexNAc(3) (T), dHex(1)HexNAc(4) (S), dHex(1)HexNAc(4) (T), dHex(1)HexNAc(5) (S), dHex(1)HexNAc(5) (T), dHex(2)Hex(1)HexNAc(1)Kdn(1) (S), dHex(2)Hex(1)HexNAc(1)Kdn(1) (T), dHex(2)Hex(1)HexNAc(2)Kdn(1) (S), dHex(2)Hex(1)HexNAc(2)Kdn(1) (T), dHex(2)Hex(1)HexNAc(2)NeuAc(1) (S), dHex(2)Hex(1)HexNAc(2)NeuAc(1) (T), dHex(2)Hex(1)HexNAc(2)NeuGc(1) (S), dHex(2)Hex(1)HexNAc(2)NeuGc(1) (T), dHex(2)Hex(1)HexNAc(3) (S), dHex(2)Hex(1)HexNAc(3) (T), dHex(2)Hex(1)HexNAc(4)Sulf(1) (S), dHex(2)Hex(1)HexNAc(4)Sulf(1) (T), dHex(2)Hex(2) (S), dHex(2)Hex(2) (T), dHex(2)Hex(2)HexA(1) (S), dHex(2)Hex(2)HexA(1) (T), dHex(2)Hex(2)HexA(1)HexNAc(1) (S), dHex(2)Hex(2)HexA(1)HexNAc(1) (T), dHex(2)Hex(2)HexA(1)HexNAc(2)Sulf(1) (S), dHex(2)Hex(2)HexA(1)HexNAc(2)Sulf(1) (T), dHex(2)Hex(2)HexNAc(1) (S), dHex(2)Hex(2)HexNAc(1) (T), dHex(2)Hex(2)HexNAc(2) (N), dHex(2)Hex(2)HexNAc(2) (S), dHex(2)Hex(2)HexNAc(2) (T), dHex(2)Hex(2)HexNAc(2)Kdn(1) (S), dHex(2)Hex(2)HexNAc(2)Kdn(1) (T), dHex(2)Hex(2)HexNAc(2)NeuAc(1) (S), dHex(2)Hex(2)HexNAc(2)NeuAc(1) (T), dHex(2)Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (S), dHex(2)Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (T), dHex(2)Hex(2)HexNAc(2)NeuGc(1) (S), dHex(2)Hex(2)HexNAc(2)NeuGc(1) (T), dHex(2)Hex(2)HexNAc(2)Sulf(1) (S), dHex(2)Hex(2)HexNAc(2)Sulf(1) (T), dHex(2)Hex(2)HexNAc(2)Sulf(2) (S), dHex(2)Hex(2)HexNAc(2)Sulf(2) (T), dHex(2)Hex(2)HexNAc(3) (N), dHex(2)Hex(2)HexNAc(3) (S), dHex(2)Hex(2)HexNAc(3) (T), dHex(2)Hex(2)HexNAc(3)NeuAc(1) (S), dHex(2)Hex(2)HexNAc(3)NeuAc(1) (T), dHex(2)Hex(2)HexNAc(3)NeuGc(1) (S), dHex(2)Hex(2)HexNAc(3)NeuGc(1) (T), dHex(2)Hex(2)HexNAc(3)Sulf(1) (S), dHex(2)Hex(2)HexNAc(3)Sulf(1) (T), dHex(2)Hex(2)HexNAc(4) (S), dHex(2)Hex(2)HexNAc(4) (T), dHex(2)Hex(2)HexNAc(4)Sulf(2) (S), dHex(2)Hex(2)HexNAc(4)Sulf(2) (T), dHex(2)Hex(2)HexNAc(5) (S), dHex(2)Hex(2)HexNAc(5) (T), dHex(2)Hex(2)HexNAc(6)Sulf(1) (S), dHex(2)Hex(2)HexNAc(6)Sulf(1) (T), dHex(2)Hex(3) (S), dHex(2)Hex(3) (T), dHex(2)Hex(3)HexA(1)HexNAc(1)Sulf(1) (S), dHex(2)Hex(3)HexA(1)HexNAc(1)Sulf(1) (T), dHex(2)Hex(3)HexA(1)HexNAc(2)Sulf(1) (S), dHex(2)Hex(3)HexA(1)HexNAc(2)Sulf(1) (T), dHex(2)Hex(3)HexA(1)HexNAc(3)Sulf(1) (S), dHex(2)Hex(3)HexA(1)HexNAc(3)Sulf(1) (T), dHex(2)Hex(3)HexNAc(1)Sulf(1) (S), dHex(2)Hex(3)HexNAc(1)Sulf(1) (T), dHex(2)Hex(3)HexNAc(2) (N), dHex(2)Hex(3)HexNAc(2) (S), dHex(2)Hex(3)HexNAc(2) (T), dHex(2)Hex(3)HexNAc(2)NeuGc(1) (S), dHex(2)Hex(3)HexNAc(2)NeuGc(1) (T), dHex(2)Hex(3)HexNAc(2)Sulf(1) (S), dHex(2)Hex(3)HexNAc(2)Sulf(1) (T), dHex(2)Hex(3)HexNAc(3) (N), dHex(2)Hex(3)HexNAc(3) (S), dHex(2)Hex(3)HexNAc(3) (T), dHex(2)Hex(3)HexNAc(3)NeuAc(1) (S), dHex(2)Hex(3)HexNAc(3)NeuAc(1) (T), dHex(2)Hex(3)HexNAc(3)NeuAc(2) (S), dHex(2)Hex(3)HexNAc(3)NeuAc(2) (T), dHex(2)Hex(3)HexNAc(3)Pent(1) (N), dHex(2)Hex(3)HexNAc(3)Pent(2) (N), dHex(2)Hex(3)HexNAc(3)Sulf(1) (S), dHex(2)Hex(3)HexNAc(3)Sulf(1) (T), dHex(2)Hex(3)HexNAc(4) (N), dHex(2)Hex(3)HexNAc(4) (S), dHex(2)Hex(3)HexNAc(4) (T), dHex(2)Hex(3)HexNAc(4)NeuAc(1) (N), dHex(2)Hex(3)HexNAc(4)Pent(1) (N), dHex(2)Hex(3)HexNAc(4)Pent(2) (N), dHex(2)Hex(3)HexNAc(5) (N), dHex(2)Hex(3)HexNAc(5) (S), dHex(2)Hex(3)HexNAc(5) (T), dHex(2)Hex(3)HexNAc(6) (N), dHex(2)Hex(4) (S), dHex(2)Hex(4) (T), dHex(2)Hex(4)HexA(1)HexNAc(3)Sulf(1) (S), dHex(2)Hex(4)HexA(1)HexNAc(3)Sulf(1) (T), dHex(2)Hex(4)HexNAc(1) (S), dHex(2)Hex(4)HexNAc(1) (T), dHex(2)Hex(4)HexNAc(2) (N), dHex(2)Hex(4)HexNAc(2) (S), dHex(2)Hex(4)HexNAc(2) (T), dHex(2)Hex(4)HexNAc(3) (N), dHex(2)Hex(4)HexNAc(3)NeuAc(1)Sulf(1) (N), dHex(2)Hex(4)HexNAc(3)Pent(1) (N), dHex(2)Hex(4)HexNAc(4) (N), dHex(2)Hex(4)HexNAc(4) (S), dHex(2)Hex(4)HexNAc(4) (T), dHex(2)Hex(4)HexNAc(4)Pent(1) (N), dHex(2)Hex(4)HexNAc(4)Sulf(1) (N), dHex(2)Hex(4)HexNAc(5) (N), dHex(2)Hex(4)HexNAc(5) (S), dHex(2)Hex(4)HexNAc(5) (T), dHex(2)Hex(5)HexNAc(2)Me(1) (S), dHex(2)Hex(5)HexNAc(2)Me(1) (T), dHex(2)Hex(5)HexNAc(3)Pent(1) (N), dHex(2)Hex(5)HexNAc(4) (N), dHex(2)HexNAc(2)Kdn(1) (S), dHex(2)HexNAc(2)Kdn(1) (T), dHex(2)HexNAc(5) (S), dHex(2)HexNAc(5) (T), dHex(2)HexNAc(7) (S), dHex(2)HexNAc(7) (T), dHex(3)Hex(1)HexNAc(2)Kdn(1) (S), dHex(3)Hex(1)HexNAc(2)Kdn(1) (T), dHex(3)Hex(1)HexNAc(3)Kdn(1) (S), dHex(3)Hex(1)HexNAc(3)Kdn(1) (T), dHex(3)Hex(2)HexA(1)HexNAc(2)Sulf(1) (S), dHex(3)Hex(2)HexA(1)HexNAc(2)Sulf(1) (T), dHex(3)Hex(2)HexNAc(2) (S), dHex(3)Hex(2)HexNAc(2) (T), dHex(3)Hex(2)HexNAc(2)Kdn(1) (S), dHex(3)Hex(2)HexNAc(2)Kdn(1) (T), dHex(3)Hex(2)HexNAc(3) (S), dHex(3)Hex(2)HexNAc(3) (T), dHex(3)Hex(2)HexNAc(3)Kdn(1) (S), dHex(3)Hex(2)HexNAc(3)Kdn(1) (T), dHex(3)Hex(2)HexNAc(4) (S), dHex(3)Hex(2)HexNAc(4) (T), dHex(3)Hex(2)HexNAc(4)Sulf(2) (S), dHex(3)Hex(2)HexNAc(4)Sulf(2) (T), dHex(3)Hex(3)HexNAc(1) (S), dHex(3)Hex(3)HexNAc(1) (T), dHex(3)Hex(3)HexNAc(2) (S), dHex(3)Hex(3)HexNAc(2) (T), dHex(3)Hex(3)HexNAc(3) (S), dHex(3)Hex(3)HexNAc(3) (T), dHex(3)Hex(3)HexNAc(3)NeuAc(1) (S), dHex(3)Hex(3)HexNAc(3)NeuAc(1) (T), dHex(3)Hex(3)HexNAc(3)Pent(1) (N), dHex(3)Hex(3)HexNAc(4) (N), dHex(3)Hex(3)HexNAc(4)Pent(1) (N), dHex(3)Hex(4)HexNAc(4) (N), dHex(3)Hex(4)HexNAc(4) (S), dHex(3)Hex(4)HexNAc(4) (T), dHex(3)Hex(4)HexNAc(4)Sulf(1) (N), dHex(3)HexNAc(3)Kdn(1) (S), dHex(3)HexNAc(3)Kdn(1) (T), dHex(4)Hex(1)HexNAc(1)Kdn(2) (S), dHex(4)Hex(1)HexNAc(1)Kdn(2) (T), dHex(4)Hex(1)HexNAc(2)Kdn(1) (S), dHex(4)Hex(1)HexNAc(2)Kdn(1) (T), dHex(4)Hex(1)HexNAc(3)Kdn(1) (S), dHex(4)Hex(1)HexNAc(3)Kdn(1) (T), dHex(4)Hex(2)HexNAc(2)Kdn(1) (S), dHex(4)Hex(2)HexNAc(2)Kdn(1) (T), dHex(4)Hex(2)HexNAc(3) (S), dHex(4)Hex(2)HexNAc(3) (T), dHex(4)Hex(3)HexNAc(2)NeuAc(1) (S), dHex(4)Hex(3)HexNAc(2)NeuAc(1) (T), dHex(4)Hex(3)HexNAc(3) (S), dHex(4)Hex(3)HexNAc(3) (T), dHex(4)HexNAc(3)Kdn(1) (S), dHex(4)HexNAc(3)Kdn(1) (T), DHP (C), Di_L-Gln_Ngamma-propargyl-L-Gln_desthiobiotin (D), Di_L-Gln_Ngamma-propargyl-L-Gln_desthiobiotin (E), Di_L-Glu_Ngamma-propargyl-L-Gln_desthiobiotin (D), Di_L-Glu_Ngamma-propargyl-L-Gln_desthiobiotin (E), Diacylglycerol (C), DiART6plex (K), DiART6plex (N-term), DiART6plex (Protein N-term), DiART6plex (Y), DiART6plex115 (K), DiART6plex115 (N-term), DiART6plex115 (Protein N-term), DiART6plex115 (Y), DiART6plex116/119 (K), DiART6plex116/119 (N-term), DiART6plex116/119 (Protein N-term), DiART6plex116/119 (Y), DiART6plex117 (K), DiART6plex117 (N-term), DiART6plex117 (Protein N-term), DiART6plex117 (Y), DiART6plex118 (K), DiART6plex118 (N-term), DiART6plex118 (Protein N-term), DiART6plex118 (Y), Dibromo (Y), Dicarbamidomethyl (C), Dicarbamidomethyl (H), Dicarbamidomethyl (K), Dicarbamidomethyl (N-term), Dicarbamidomethyl (R), dichlorination (C), dichlorination (Y), Didehydro (C-term K), Didehydro (S), Didehydro (T), Didehydro (Y), Didehydroretinylidene (K), Diethyl (K), Diethyl (N-term), Diethylphosphate (C), Diethylphosphate (H), Diethylphosphate (K), Diethylphosphate (N-term), Diethylphosphate (S), Diethylphosphate (T), Diethylphosphate (Y), Diethylphosphothione (C), Diethylphosphothione (H), Diethylphosphothione (K), Diethylphosphothione (S), Diethylphosphothione (T), Diethylphosphothione (Y), Difuran (Y), Dihydroxyimidazolidine (R), Diiodo (H), Diiodo (Y), Diironsubcluster (C), Diisopropylphosphate (K), Diisopropylphosphate (N-term), Diisopropylphosphate (S), Diisopropylphosphate (T), Diisopropylphosphate (Y), DiLeu4plex (K), DiLeu4plex (N-term), DiLeu4plex (Y), DiLeu4plex115 (K), DiLeu4plex115 (N-term), DiLeu4plex115 (Y), DiLeu4plex117 (K), DiLeu4plex117 (N-term), DiLeu4plex117 (Y), DiLeu4plex118 (K), DiLeu4plex118 (N-term), DiLeu4plex118 (Y), Dimethyl (K), Dimethyl (N), Dimethyl (N-term), Dimethyl (Protein N-term P), Dimethyl (Protein N-term), Dimethyl (R), Dimethyl:2H(2)13C (K), Dimethyl:2H(2)13C (N), Dimethyl:2H(2)13C (N-term), Dimethyl:2H(2)13C (Protein N-term P), Dimethyl:2H(2)13C (R), Dimethyl:2H(4) (K), Dimethyl:2H(4) (N-term), Dimethyl:2H(4) (Protein N-term), Dimethyl:2H(4) (R), Dimethyl:2H(4)13C(2) (K), Dimethyl:2H(4)13C(2) (N-term), Dimethyl:2H(4)13C(2) (Protein N-term), Dimethyl:2H(4)13C(2) (R), Dimethyl:2H(6) (K), Dimethyl:2H(6) (N-term), Dimethyl:2H(6) (R), Dimethyl:2H(6)13C(2) (K), Dimethyl:2H(6)13C(2) (N-term), Dimethyl:2H(6)13C(2) (Protein N-term), Dimethyl:2H(6)13C(2) (R), DimethylamineGMBS (C), Dimethylaminoethyl (C), DimethylArsino (C), Dimethylphosphothione (C), Dimethylphosphothione (H), Dimethylphosphothione (K), Dimethylphosphothione (S), Dimethylphosphothione (T), Dimethylphosphothione (Y), DimethylpyrroleAdduct (K), Dioxidation (C), Dioxidation (E), Dioxidation (F), Dioxidation (I), Dioxidation (K), Dioxidation (L), Dioxidation (M), Dioxidation (P), Dioxidation (R), Dioxidation (U), Dioxidation (V), Dioxidation (W), Dioxidation (Y), Diphthamide (H), Dipyridyl (C), Dipyrrolylmethanemethyl (C), DMPO (C), DMPO (H), DMPO (Y), DNCB_hapten (C), DNCB_hapten (H), DNCB_hapten (K), DNCB_hapten (Y), dNIC (K), dNIC (N-term), DNPS (C), DNPS (W), DPIA (C), DTT (C), DVFQQQTGG (K), DyLight-maleimide (C), DYn-2 (C), EDEDTIDVFQQQTGG (K), EDT-iodoacetyl-PEO-biotin (S), EDT-iodoacetyl-PEO-biotin (T), EDT-maleimide-PEO-biotin (S), EDT-maleimide-PEO-biotin (T), EEEDVIEVYQEQTGG (K), EGCG1 (C), EGCG2 (C), EHD-diphenylpentanone (C), EHD-diphenylpentanone (M), EQAT (C), EQAT:2H(5) (C), EQIGG (K), ESP (K), ESP (N-term), ESP:2H(10) (K), ESP:2H(10) (N-term), Ethanedithiol (S), Ethanedithiol (T), Ethanolamine (C), Ethanolamine (C-term), Ethanolamine (D), Ethanolamine (E), Ethanolyl (C), Ethanolyl (K), Ethanolyl (R), Ethyl (C-term), Ethyl (D), Ethyl (E), Ethyl (K), Ethyl (N-term), Ethyl (Protein N-term), Ethyl+Deamidated (N), Ethyl+Deamidated (Q), ethylamino (S), ethylamino (T), Ethylphosphate (K), Ethylphosphate (N-term), Ethylphosphate (S), Ethylphosphate (T), Ethylphosphate (Y), ethylsulfonylethyl (C), ethylsulfonylethyl (H), ethylsulfonylethyl (K), Ethynyl (C), ExacTagAmine (K), ExacTagThiol (C), FAD (C), FAD (H), FAD (Y), Farnesyl (C), Fluorescein (C), Fluorescein-tyramine (Y), Fluoro (A), Fluoro (F), Fluoro (W), Fluoro (Y), FMN (S), FMN (T), FMNC (C), FMNH (C), FMNH (H), FNEM (C), Formyl (K), Formyl (N-term), Formyl (Protein N-term), Formyl (S), Formyl (T), Formylasparagine (H), FormylMet (Protein N-term), FP-Biotin (K), FP-Biotin (S), FP-Biotin (T), FP-Biotin (Y), FTC (C), FTC (K), FTC (P), FTC (R), FTC (S), Furan (Y), G-H1 (R), Galactosyl (K), Galactosyl (N-term), GEE (Q), GeranylGeranyl (C), GG (C), GG (K), GG (Protein N-term), GG (S), GG (T), GGQ (K), GIST-Quat (K), GIST-Quat (N-term), GIST-Quat:2H(3) (K), GIST-Quat:2H(3) (N-term), GIST-Quat:2H(6) (K), GIST-Quat:2H(6) (N-term), GIST-Quat:2H(9) (K), GIST-Quat:2H(9) (N-term), Gln->Ala (Q), Gln->Arg (Q), Gln->Asn (Q), Gln->Asp (Q), Gln->Cys (Q), Gln->Glu (Q), Gln->Gly (Q), Gln->His (Q), Gln->Lys (Q), Gln->Met (Q), Gln->Phe (Q), Gln->Pro (Q), Gln->pyro-Glu (N-term Q), Gln->Ser (Q), Gln->Thr (Q), Gln->Trp (Q), Gln->Tyr (Q), Gln->Val (Q), Gln->Xle (Q), Glu (E), Glu (Protein C-term), Glu+O(2) (H), Glu->Ala (E), Glu->Arg (E), Glu->Asn (E), Glu->Asp (E), Glu->Cys (E), Glu->Gln (E), Glu->Gly (E), Glu->His (E), Glu->Lys (E), Glu->Met (E), Glu->Phe (E), Glu->Pro (E), Glu->pyro-Glu (N-term E), Glu->pyro-Glu+Methyl (N-term E), Glu->pyro-Glu+Methyl:2H(2)13C(1) (N-term E), Glu->Ser (E), Glu->Thr (E), Glu->Trp (E), Glu->Tyr (E), Glu->Val (E), Glu->Xle (E), glucosone (R), Glucosylgalactosyl (K), Glucuronyl (Protein N-term), Glucuronyl (S), Glucuronyl (T), GluGlu (E), GluGlu (Protein C-term), GluGluGlu (E), GluGluGlu (Protein C-term), GluGluGluGlu (E), GluGluGluGlu (Protein C-term), Gluratylation (K), Glutathione (C), Gly (K), Gly (S), Gly (T), Gly+O(2) (H), Gly->Ala (G), Gly->Arg (G), Gly->Asn (G), Gly->Asp (G), Gly->Cys (G), Gly->Gln (G), Gly->Glu (G), Gly->His (G), Gly->Lys (G), Gly->Met (G), Gly->Phe (G), Gly->Pro (G), Gly->Ser (G), Gly->Thr (G), Gly->Trp (G), Gly->Tyr (G), Gly->Val (G), Gly->Xle (G), Gly-loss+Amide (C-term G), Glycerophospho (S), Glyceroyl (K), Glyceroyl (Protein N-term), GlycerylPE (E), glycidamide (K), glycidamide (N-term), Glycosyl (P), glyoxalAGE (R), Glyoxylyl (K), GNLLFLACYCIGG (K), GPIanchor (Protein C-term), Guanidinyl (K), Guanidinyl (N-term), Haloxon (C), Haloxon (H), Haloxon (K), Haloxon (S), Haloxon (T), Haloxon (Y), HCysteinyl (C), HCysThiolactone (K), Heme (C), Heme (H), Hep (K), Hep (N), Hep (Q), Hep (R), Hep (S), Hep (T), Hex (C), Hex (K), Hex (N), Hex (N-term), Hex (R), Hex (S), Hex (T), Hex (W), Hex (Y), Hex(1)HexA(1) (S), Hex(1)HexA(1) (T), Hex(1)HexA(1)HexNAc(1) (S), Hex(1)HexA(1)HexNAc(1) (T), Hex(1)HexA(1)HexNAc(2) (S), Hex(1)HexA(1)HexNAc(2) (T), Hex(1)HexNAc(1) (N), Hex(1)HexNAc(1) (S), Hex(1)HexNAc(1) (T), Hex(1)HexNAc(1)dHex(1) (N), Hex(1)HexNAc(1)dHex(1) (S), Hex(1)HexNAc(1)dHex(1) (T), Hex(1)HexNAc(1)dHex(1)Me(1) (S), Hex(1)HexNAc(1)dHex(1)Me(1) (T), Hex(1)HexNAc(1)dHex(1)Me(2) (S), Hex(1)HexNAc(1)dHex(1)Me(2) (T), Hex(1)HexNAc(1)Kdn(1)Sulf(1) (S), Hex(1)HexNAc(1)Kdn(1)Sulf(1) (T), Hex(1)HexNAc(1)NeuAc(1) (N), Hex(1)HexNAc(1)NeuAc(1) (S), Hex(1)HexNAc(1)NeuAc(1) (T), Hex(1)HexNAc(1)NeuAc(1)Ac(1) (S), Hex(1)HexNAc(1)NeuAc(1)Ac(1) (T), Hex(1)HexNAc(1)NeuAc(1)NeuGc(1) (S), Hex(1)HexNAc(1)NeuAc(1)NeuGc(1) (T), Hex(1)HexNAc(1)NeuAc(1)Sulf(1) (S), Hex(1)HexNAc(1)NeuAc(1)Sulf(1) (T), Hex(1)HexNAc(1)NeuAc(2) (N), Hex(1)HexNAc(1)NeuAc(2) (S), Hex(1)HexNAc(1)NeuAc(2) (T), Hex(1)HexNAc(1)NeuAc(2)Ac(1) (S), Hex(1)HexNAc(1)NeuAc(2)Ac(1) (T), Hex(1)HexNAc(1)NeuAc(2)Ac(2) (S), Hex(1)HexNAc(1)NeuAc(2)Ac(2) (T), Hex(1)HexNAc(1)NeuAc(3) (S), Hex(1)HexNAc(1)NeuAc(3) (T), Hex(1)HexNAc(1)NeuGc(1) (S), Hex(1)HexNAc(1)NeuGc(1) (T), Hex(1)HexNAc(1)NeuGc(2) (S), Hex(1)HexNAc(1)NeuGc(2) (T), Hex(1)HexNAc(1)NeuGc(3) (S), Hex(1)HexNAc(1)NeuGc(3) (T), Hex(1)HexNAc(1)NeuGc(4) (S), Hex(1)HexNAc(1)NeuGc(4) (T), Hex(1)HexNAc(1)NeuGc(5) (S), Hex(1)HexNAc(1)NeuGc(5) (T), Hex(1)HexNAc(1)Phos(1) (S), Hex(1)HexNAc(1)Phos(1) (T), Hex(1)HexNAc(1)Sulf(1) (S), Hex(1)HexNAc(1)Sulf(1) (T), Hex(1)HexNAc(2) (N), Hex(1)HexNAc(2) (S), Hex(1)HexNAc(2) (T), Hex(1)HexNAc(2)dHex(1) (N), Hex(1)HexNAc(2)dHex(1) (S), Hex(1)HexNAc(2)dHex(1) (T), Hex(1)HexNAc(2)dHex(1)Pent(1) (N), Hex(1)HexNAc(2)dHex(2) (N), Hex(1)HexNAc(2)dHex(2) (S), Hex(1)HexNAc(2)dHex(2) (T), Hex(1)HexNAc(2)dHex(2)Sulf(1) (S), Hex(1)HexNAc(2)dHex(2)Sulf(1) (T), Hex(1)HexNAc(2)NeuAc(1) (S), Hex(1)HexNAc(2)NeuAc(1) (T), Hex(1)HexNAc(2)NeuAc(1)Sulf(1) (S), Hex(1)HexNAc(2)NeuAc(1)Sulf(1) (T), Hex(1)HexNAc(2)NeuAc(2) (S), Hex(1)HexNAc(2)NeuAc(2) (T), Hex(1)HexNAc(2)NeuAc(2)Sulf(1) (S), Hex(1)HexNAc(2)NeuAc(2)Sulf(1) (T), Hex(1)HexNAc(2)NeuGc(1) (S), Hex(1)HexNAc(2)NeuGc(1) (T), Hex(1)HexNAc(2)Pent(1) (N), Hex(1)HexNAc(2)Sulf(1) (S), Hex(1)HexNAc(2)Sulf(1) (T), Hex(1)HexNAc(3) (S), Hex(1)HexNAc(3) (T), Hex(1)HexNAc(3)NeuAc(1) (S), Hex(1)HexNAc(3)NeuAc(1) (T), Hex(1)HexNAc(3)NeuAc(2) (S), Hex(1)HexNAc(3)NeuAc(2) (T), Hex(1)HexNAc(3)NeuGc(1) (S), Hex(1)HexNAc(3)NeuGc(1) (T), Hex(1)HexNAc(3)Sulf(1) (S), Hex(1)HexNAc(3)Sulf(1) (T), Hex(1)HexNAc(4)dHex(1)Sulf(1) (S), Hex(1)HexNAc(4)dHex(1)Sulf(1) (T), Hex(1)NeuAc(1) (S), Hex(1)NeuAc(1) (T), Hex(1)NeuAc(1)Pent(1) (S), Hex(1)NeuAc(1)Pent(1) (T), Hex(1)NeuGc(1) (S), Hex(1)NeuGc(1) (T), Hex(1)Pent(1) (S), Hex(1)Pent(1) (T), Hex(1)Pent(2) (S), Hex(1)Pent(2) (T), Hex(1)Pent(2)Me(1) (S), Hex(1)Pent(2)Me(1) (T), Hex(1)Pent(3) (S), Hex(1)Pent(3) (T), Hex(1)Pent(3)Me(1) (S), Hex(1)Pent(3)Me(1) (T), Hex(10)HexNAc(1) (N), Hex(10)Phos(3) (S), Hex(10)Phos(3) (T), Hex(2) (K), Hex(2) (R), Hex(2) (S), Hex(2) (T), Hex(2)HexA(1)HexNAc(1)Sulf(1) (S), Hex(2)HexA(1)HexNAc(1)Sulf(1) (T), Hex(2)HexA(1)NeuAc(1)Pent(1)Sulf(1) (S), Hex(2)HexA(1)NeuAc(1)Pent(1)Sulf(1) (T), Hex(2)HexA(1)Pent(1)Sulf(1) (S), Hex(2)HexA(1)Pent(1)Sulf(1) (T), Hex(2)HexNAc(1) (N), Hex(2)HexNAc(1) (S), Hex(2)HexNAc(1) (T), Hex(2)HexNAc(1)Me(1) (S), Hex(2)HexNAc(1)Me(1) (T), Hex(2)HexNAc(1)NeuGc(1) (S), Hex(2)HexNAc(1)NeuGc(1) (T), Hex(2)HexNAc(1)NeuGc(2) (S), Hex(2)HexNAc(1)NeuGc(2) (T), Hex(2)HexNAc(1)NeuGc(3) (S), Hex(2)HexNAc(1)NeuGc(3) (T), Hex(2)HexNAc(1)NeuGc(4) (S), Hex(2)HexNAc(1)NeuGc(4) (T), Hex(2)HexNAc(1)Pent(1)HexA(1) (S), Hex(2)HexNAc(1)Pent(1)HexA(1) (T), Hex(2)HexNAc(1)Sulf(1) (S), Hex(2)HexNAc(1)Sulf(1) (T), Hex(2)HexNAc(2) (N), Hex(2)HexNAc(2) (S), Hex(2)HexNAc(2) (T), Hex(2)HexNAc(2)dHex(1) (N), Hex(2)HexNAc(2)dHex(1) (S), Hex(2)HexNAc(2)dHex(1) (T), Hex(2)HexNAc(2)NeuAc(1) (N), Hex(2)HexNAc(2)NeuAc(1) (S), Hex(2)HexNAc(2)NeuAc(1) (T), Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (S), Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (T), Hex(2)HexNAc(2)NeuAc(2) (S), Hex(2)HexNAc(2)NeuAc(2) (T), Hex(2)HexNAc(2)NeuAc(2)Sulf(1) (S), Hex(2)HexNAc(2)NeuAc(2)Sulf(1) (T), Hex(2)HexNAc(2)NeuGc(1) (S), Hex(2)HexNAc(2)NeuGc(1) (T), Hex(2)HexNAc(2)Pent(1) (N), Hex(2)HexNAc(2)Sulf(1) (S), Hex(2)HexNAc(2)Sulf(1) (T), Hex(2)HexNAc(3) (N), Hex(2)HexNAc(3) (S), Hex(2)HexNAc(3) (T), Hex(2)HexNAc(3)NeuAc(1)NeuGc(1) (S), Hex(2)HexNAc(3)NeuAc(1)NeuGc(1) (T), Hex(2)HexNAc(3)NeuAc(1)Sulf(1) (S), Hex(2)HexNAc(3)NeuAc(1)Sulf(1) (T), Hex(2)HexNAc(3)NeuAc(2) (S), Hex(2)HexNAc(3)NeuAc(2) (T), Hex(2)HexNAc(3)NeuAc(3) (S), Hex(2)HexNAc(3)NeuAc(3) (T), Hex(2)HexNAc(3)NeuGc(1) (S), Hex(2)HexNAc(3)NeuGc(1) (T), Hex(2)HexNAc(3)NeuGc(2) (S), Hex(2)HexNAc(3)NeuGc(2) (T), Hex(2)HexNAc(3)NeuGc(3) (S), Hex(2)HexNAc(3)NeuGc(3) (T), Hex(2)HexNAc(3)Sulf(1) (S), Hex(2)HexNAc(3)Sulf(1) (T), Hex(2)HexNAc(4) (N), Hex(2)HexNAc(4) (S), Hex(2)HexNAc(4) (T), Hex(2)HexNAc(4)NeuAc(1) (S), Hex(2)HexNAc(4)NeuAc(1) (T), Hex(2)HexNAc(5) (S), Hex(2)HexNAc(5) (T), Hex(2)NeuAc(1) (S), Hex(2)NeuAc(1) (T), Hex(2)Pent(2) (S), Hex(2)Pent(2) (T), Hex(2)Pent(2)Me(1) (S), Hex(2)Pent(2)Me(1) (T), Hex(2)Sulf(1) (S), Hex(2)Sulf(1) (T), Hex(3) (N), Hex(3) (S), Hex(3) (T), Hex(3)HexNAc(1) (N), Hex(3)HexNAc(1) (S), Hex(3)HexNAc(1) (T), Hex(3)HexNAc(1)HexA(1) (S), Hex(3)HexNAc(1)HexA(1) (T), Hex(3)HexNAc(1)Me(1) (S), Hex(3)HexNAc(1)Me(1) (T), Hex(3)HexNAc(1)Pent(1) (N), Hex(3)HexNAc(2) (N), Hex(3)HexNAc(2) (S), Hex(3)HexNAc(2) (T), Hex(3)HexNAc(2)NeuAc(1) (N), Hex(3)HexNAc(2)NeuAc(2) (S), Hex(3)HexNAc(2)NeuAc(2) (T), Hex(3)HexNAc(2)Pent(1) (N), Hex(3)HexNAc(2)Phos(1) (N), Hex(3)HexNAc(3) (N), Hex(3)HexNAc(3) (S), Hex(3)HexNAc(3) (T), Hex(3)HexNAc(3)NeuAc(1) (S), Hex(3)HexNAc(3)NeuAc(1) (T), Hex(3)HexNAc(3)NeuAc(1)Sulf(1) (S), Hex(3)HexNAc(3)NeuAc(1)Sulf(1) (T), Hex(3)HexNAc(3)NeuAc(2) (S), Hex(3)HexNAc(3)NeuAc(2) (T), Hex(3)HexNAc(3)NeuAc(2)Sulf(1) (S), Hex(3)HexNAc(3)NeuAc(2)Sulf(1) (T), Hex(3)HexNAc(3)NeuAc(3) (S), Hex(3)HexNAc(3)NeuAc(3) (T), Hex(3)HexNAc(3)NeuGc(1) (S), Hex(3)HexNAc(3)NeuGc(1) (T), Hex(3)HexNAc(3)NeuGc(1)Sulf(1) (S), Hex(3)HexNAc(3)NeuGc(1)Sulf(1) (T), Hex(3)HexNAc(3)Pent(1) (N), Hex(3)HexNAc(3)Sulf(1) (N), Hex(3)HexNAc(3)Sulf(1) (S), Hex(3)HexNAc(3)Sulf(1) (T), Hex(3)HexNAc(4) (N), Hex(3)HexNAc(4) (S), Hex(3)HexNAc(4) (T), Hex(3)HexNAc(4)NeuAc(1) (N), Hex(3)HexNAc(4)NeuAc(2) (N), Hex(3)HexNAc(4)Pent(1) (N), Hex(3)HexNAc(4)Sulf(1) (N), Hex(3)HexNAc(5) (N), Hex(3)HexNAc(5) (S), Hex(3)HexNAc(5) (T), Hex(3)HexNAc(5)NeuAc(1) (N), Hex(3)HexNAc(5)Sulf(1) (N), Hex(3)HexNAc(6) (N), Hex(3)HexNAc(6) (S), Hex(3)HexNAc(6) (T), Hex(3)HexNAc(6)NeuAc(1) (N), Hex(3)HexNAc(6)Sulf(1) (N), Hex(3)HexNAc(6)Sulf(2) (N), Hex(3)HexNAc(7) (N), Hex(3)HexNAc(7)Sulf(1) (N), Hex(4) (S), Hex(4) (T), Hex(4)HexA(1) (S), Hex(4)HexA(1) (T), Hex(4)HexA(1)HexNAc(1) (S), Hex(4)HexA(1)HexNAc(1) (T), Hex(4)HexNAc(1) (N), Hex(4)HexNAc(1) (S), Hex(4)HexNAc(1) (T), Hex(4)HexNAc(2) (N), Hex(4)HexNAc(2)NeuAc(1) (N), Hex(4)HexNAc(2)NeuAc(1) (S), Hex(4)HexNAc(2)NeuAc(1) (T), Hex(4)HexNAc(2)Pent(1) (N), Hex(4)HexNAc(3) (N), Hex(4)HexNAc(3) (S), Hex(4)HexNAc(3) (T), Hex(4)HexNAc(3)NeuAc(1) (N), Hex(4)HexNAc(3)NeuAc(1) (S), Hex(4)HexNAc(3)NeuAc(1) (T), Hex(4)HexNAc(3)NeuAc(2) (N), Hex(4)HexNAc(3)NeuGc(1) (N), Hex(4)HexNAc(3)Pent(1) (N), Hex(4)HexNAc(4) (N), Hex(4)HexNAc(4) (S), Hex(4)HexNAc(4) (T), Hex(4)HexNAc(4)Me(2)Pent(1) (N), Hex(4)HexNAc(4)NeuAc(1) (N), Hex(4)HexNAc(4)NeuAc(1) (S), Hex(4)HexNAc(4)NeuAc(1) (T), Hex(4)HexNAc(4)NeuAc(1)Sulf(2) (S), Hex(4)HexNAc(4)NeuAc(1)Sulf(2) (T), Hex(4)HexNAc(4)NeuAc(1)Sulf(3) (S), Hex(4)HexNAc(4)NeuAc(1)Sulf(3) (T), Hex(4)HexNAc(4)NeuGc(1) (N), Hex(4)HexNAc(4)NeuGc(1) (S), Hex(4)HexNAc(4)NeuGc(1) (T), Hex(4)HexNAc(4)NeuGc(1)Sulf(2) (S), Hex(4)HexNAc(4)NeuGc(1)Sulf(2) (T), Hex(4)HexNAc(4)Pent(1) (N), Hex(4)HexNAc(4)Sulf(1) (N), Hex(4)HexNAc(4)Sulf(2) (S), Hex(4)HexNAc(4)Sulf(2) (T), Hex(4)HexNAc(5) (N), Hex(4)HexNAc(5)NeuAc(1) (N), Hex(4)HexNAc(5)Sulf(1) (N), Hex(4)HexNAc(6) (N), Hex(4)Phos(1) (S), Hex(4)Phos(1) (T), Hex(5) (S), Hex(5) (T), Hex(5)HexA(1) (S), Hex(5)HexA(1) (T), Hex(5)HexNAc(1) (N), Hex(5)HexNAc(1) (S), Hex(5)HexNAc(1) (T), Hex(5)HexNAc(2) (N), Hex(5)HexNAc(2)Phos(1) (N), Hex(5)HexNAc(3) (N), Hex(5)HexNAc(3)Pent(1) (N), Hex(5)HexNAc(4) (N), Hex(5)HexNAc(4) (S), Hex(5)HexNAc(4) (T), Hex(5)HexNAc(4)Me(2)Pent(1) (N), Hex(5)HexNAc(4)NeuAc(1) (N), Hex(5)HexNAc(4)NeuAc(1)Ac(1) (N), Hex(5)HexNAc(4)NeuAc(1)Ac(2) (N), Hex(5)HexNAc(4)NeuAc(1)Sulf(1) (N), Hex(5)HexNAc(4)NeuAc(2) (N), Hex(5)HexNAc(4)NeuGc(1) (N), Hex(5)HexNAc(4)Sulf(1) (N), Hex(5)HexNAc(5) (N), Hex(5)HexNAc(5) (S), Hex(5)HexNAc(5) (T), Hex(5)Phos(1) (S), Hex(5)Phos(1) (T), Hex(5)Phos(3) (S), Hex(5)Phos(3) (T), Hex(6)HexNAc(1) (N), Hex(6)HexNAc(2) (N), Hex(6)HexNAc(2)Phos(1) (N), Hex(6)HexNAc(3) (N), Hex(6)HexNAc(3)Phos(1) (N), Hex(6)HexNAc(4) (N), Hex(6)HexNAc(4) (S), Hex(6)HexNAc(4) (T), Hex(6)HexNAc(4)Me(3) (N), Hex(6)HexNAc(4)Me(3)Pent(1) (N), Hex(6)HexNAc(5) (N), Hex(6)HexNAc(5)NeuAc(3) (N), Hex(6)Phos(1) (S), Hex(6)Phos(1) (T), Hex(6)Phos(3) (S), Hex(6)Phos(3) (T), Hex(7)HexNAc(1) (N), Hex(7)HexNAc(2) (N), Hex(7)HexNAc(2)Phos(1) (N), Hex(7)HexNAc(2)Phos(2) (N), Hex(7)HexNAc(3) (N), Hex(7)HexNAc(3)Phos(1) (N), Hex(7)HexNAc(4) (N), Hex(7)HexNAc(6) (N), Hex(7)HexNAc(6) (S), Hex(7)HexNAc(6) (T), Hex(7)Phos(3) (S), Hex(7)Phos(3) (T), Hex(8)HexNAc(1) (N), Hex(8)HexNAc(2) (N), Hex(8)Phos(3) (S), Hex(8)Phos(3) (T), Hex(9) (N), Hex(9)HexNAc(1) (N), Hex(9)HexNAc(2) (N), Hex(9)Phos(3) (S), Hex(9)Phos(3) (T), HexA(2)HexNAc(3) (S), HexA(2)HexNAc(3) (T), Hexanoyl (K), HexN (K), HexN (N), HexN (S), HexN (T), HexN (W), HexNAc (C), HexNAc (N), HexNAc (S), HexNAc (T), HexNAc(1)dHex(1) (N), HexNAc(1)dHex(1) (S), HexNAc(1)dHex(1) (T), HexNAc(1)dHex(2) (N), HexNAc(1)Kdn(2) (S), HexNAc(1)Kdn(2) (T), HexNAc(1)NeuAc(1) (S), HexNAc(1)NeuAc(1) (T), HexNAc(1)NeuGc(1) (S), HexNAc(1)NeuGc(1) (T), HexNAc(1)NeuGc(2) (S), HexNAc(1)NeuGc(2) (T), HexNAc(2) (N), HexNAc(2) (S), HexNAc(2) (T), HexNAc(2)dHex(1) (N), HexNAc(2)dHex(2) (N), HexNAc(2)NeuAc(1) (S), HexNAc(2)NeuAc(1) (T), HexNAc(2)NeuAc(1)Sulf(1) (S), HexNAc(2)NeuAc(1)Sulf(1) (T), HexNAc(2)NeuGc(1) (S), HexNAc(2)NeuGc(1) (T), HexNAc(2)Sulf(1) (S), HexNAc(2)Sulf(1) (T), HexNAc(3) (S), HexNAc(3) (T), HexNAc(3)Sulf(1) (S), HexNAc(3)Sulf(1) (T), HexNAc(4) (S), HexNAc(4) (T), HexNAc(5) (S), HexNAc(5) (T), His+O(2) (H), His->Ala (H), His->Arg (H), His->Asn (H), His->Asp (H), His->Cys (H), His->Gln (H), His->Glu (H), His->Gly (H), His->Lys (H), His->Met (H), His->Phe (H), His->Pro (H), His->Ser (H), His->Thr (H), His->Trp (H), His->Tyr (H), His->Val (H), His->Xle (H), HMVK (C), HN2_mustard (C), HN2_mustard (H), HN2_mustard (K), HN3_mustard (C), HN3_mustard (H), HN3_mustard (K), HNE (A), HNE (C), HNE (H), HNE (K), HNE (L), HNE (R), HNE+Delta:H(2) (C), HNE+Delta:H(2) (H), HNE+Delta:H(2) (K), HNE-BAHAH (C), HNE-BAHAH (H), HNE-BAHAH (K), HNE-Delta:H(2)O (C), HNE-Delta:H(2)O (H), HNE-Delta:H(2)O (K), Homocysteic_acid (M), HPG (R), Hydroxamic_acid (D), Hydroxamic_acid (E), Hydroxycinnamyl (C), Hydroxyfarnesyl (C), Hydroxyheme (E), hydroxyisobutyryl (K), Hydroxymethyl (N), HydroxymethylOP (K), Hydroxytrimethyl (K), Hypusine (K), IASD (C), IBTP (C), ICAT-C (C), ICAT-C:13C(9) (C), ICAT-D (C), ICAT-D:2H(8) (C), ICAT-G (C), ICAT-G:2H(8) (C), ICAT-H (C), ICAT-H:13C(6) (C), ICDID (C), ICDID:2H(6) (C), ICPL (K), ICPL (N-term), ICPL (Protein N-term), ICPL:13C(6) (K), ICPL:13C(6) (N-term), ICPL:13C(6) (Protein N-term), ICPL:13C(6)2H(4) (K), ICPL:13C(6)2H(4) (N-term), ICPL:13C(6)2H(4) (Protein N-term), ICPL:2H(4) (K), ICPL:2H(4) (N-term), ICPL:2H(4) (Protein N-term), IDEnT (C), IED-Biotin (C), IGBP (C), IGBP:13C(2) (C), IMEHex(2)NeuAc(1) (K), IMID (K), IMID:2H(4) (K), Iminobiotin (K), Iminobiotin (N-term), Iodo (H), Iodo (Y), Iodoacetanilide (C), Iodoacetanilide (K), Iodoacetanilide (N-term), Iodoacetanilide:13C(6) (C), Iodoacetanilide:13C(6) (K), Iodoacetanilide:13C(6) (N-term), iodoTMT (C), iodoTMT (D), iodoTMT (E), iodoTMT (H), iodoTMT (K), iodoTMT6plex (C), iodoTMT6plex (D), iodoTMT6plex (E), iodoTMT6plex (H), iodoTMT6plex (K), IodoU-AMP (F), IodoU-AMP (W), IodoU-AMP (Y), ISD_z+2_ion (N-term), Isopropylphospho (S), Isopropylphospho (T), Isopropylphospho (Y), Isovaleryl (K), iST-NHS specific cysteine modification (C), Itaconatyl (C), Itaconyl (K), iTRAQ4plex (C), iTRAQ4plex (H), iTRAQ4plex (K), iTRAQ4plex (N-term), iTRAQ4plex (Protein N-term), iTRAQ4plex (S), iTRAQ4plex (T), iTRAQ4plex (Y), iTRAQ4plex114 (C), iTRAQ4plex114 (K), iTRAQ4plex114 (N-term), iTRAQ4plex114 (Y), iTRAQ4plex115 (C), iTRAQ4plex115 (K), iTRAQ4plex115 (N-term), iTRAQ4plex115 (Y), iTRAQ8plex (C), iTRAQ8plex (H), iTRAQ8plex (K), iTRAQ8plex (N-term), iTRAQ8plex (Protein N-term), iTRAQ8plex (S), iTRAQ8plex (T), iTRAQ8plex (Y), iTRAQ8plex:13C(6)15N(2) (C), iTRAQ8plex:13C(6)15N(2) (K), iTRAQ8plex:13C(6)15N(2) (N-term), iTRAQ8plex:13C(6)15N(2) (Y), L-Gln (D), L-Gln (E), Label:13C(1)2H(3) (M), Label:13C(1)2H(3)+Oxidation (M), Label:13C(2)15N(1) (G), Label:13C(2)15N(2) (K), Label:13C(3) (A), Label:13C(3)15N(1) (A), Label:13C(3)15N(1) (S), Label:13C(4) (M), Label:13C(4)+Oxidation (M), Label:13C(4)15N(1) (D), Label:13C(4)15N(2)+GG (K), Label:13C(5) (P), Label:13C(5)15N(1) (E), Label:13C(5)15N(1) (M), Label:13C(5)15N(1) (P), Label:13C(5)15N(1) (V), Label:13C(6) (I), Label:13C(6) (K), Label:13C(6) (L), Label:13C(6) (R), Label:13C(6)+Acetyl (K), Label:13C(6)+Dimethyl (K), Label:13C(6)+GG (K), Label:13C(6)15N(1) (I), Label:13C(6)15N(1) (L), Label:13C(6)15N(2) (K), Label:13C(6)15N(2)+Acetyl (K), Label:13C(6)15N(2)+Dimethyl (K), Label:13C(6)15N(2)+GG (K), Label:13C(6)15N(2)+TMT6plex (K), Label:13C(6)15N(2)+TMTpro (K), Label:13C(6)15N(4) (R), Label:13C(6)15N(4)+Dimethyl (R), Label:13C(6)15N(4)+Dimethyl:2H(6)13C(2) (R), Label:13C(6)15N(4)+Methyl (R), Label:13C(6)15N(4)+Methyl:2H(3)13C(1) (R), Label:13C(9) (F), Label:13C(9) (Y), Label:13C(9)+Phospho (Y), Label:13C(9)15N(1) (F), Label:15N(1) (A), Label:15N(1) (C), Label:15N(1) (D), Label:15N(1) (E), Label:15N(1) (F), Label:15N(1) (G), Label:15N(1) (I), Label:15N(1) (L), Label:15N(1) (M), Label:15N(1) (P), Label:15N(1) (S), Label:15N(1) (T), Label:15N(1) (V), Label:15N(1) (Y), Label:15N(2) (K), Label:15N(2) (N), Label:15N(2) (Q), Label:15N(2) (W), Label:15N(2)2H(9) (K), Label:15N(3) (H), Label:15N(4) (R), Label:18O(1) (C-term), Label:18O(1) (S), Label:18O(1) (T), Label:18O(1) (Y), Label:18O(2) (C-term), Label:2H(10) (L), Label:2H(3) (L), Label:2H(3) (M), Label:2H(3)+Oxidation (M), Label:2H(4) (A), Label:2H(4) (F), Label:2H(4) (K), Label:2H(4) (U), Label:2H(4) (Y), Label:2H(4)+Acetyl (K), Label:2H(4)+GG (K), Label:2H(4)13C(1) (R), Label:2H(6)15N(1) (P), Label:2H(7)15N(4) (R), Label:2H(9)13C(6)15N(2) (K), Lactylation (K), lapachenole (C), Leu->MetOx (L), LG-anhydrolactam (K), LG-anhydrolactam (N-term), LG-anhyropyrrole (K), LG-anhyropyrrole (N-term), LG-Hlactam-K (K), LG-Hlactam-K (Protein N-term), LG-Hlactam-R (R), LG-lactam-K (K), LG-lactam-K (Protein N-term), LG-lactam-R (R), LG-pyrrole (C), LG-pyrrole (K), LG-pyrrole (N-term), Lipoyl (K), LRGG (K), LRGG+dimethyl (K), LRGG+methyl (K), LTX+Lophotoxin (Y), Lys (N-term), Lys+O(2) (H), Lys->Ala (K), Lys->Allysine (K), Lys->AminoadipicAcid (K), Lys->Arg (K), Lys->Asn (K), Lys->Asp (K), Lys->CamCys (K), Lys->Cys (K), Lys->Gln (K), Lys->Glu (K), Lys->Gly (K), Lys->His (K), Lys->Met (K), Lys->MetOx (K), Lys->Phe (K), Lys->Pro (K), Lys->Ser (K), Lys->Thr (K), Lys->Trp (K), Lys->Tyr (K), Lys->Val (K), Lys->Xle (K), Lys-loss (K), Lys-loss (Protein C-term K), Lysbiotinhydrazide (K), maleimide (C), maleimide (K), Maleimide-PEO2-Biotin (C), maleimide3 (C), maleimide3 (K), maleimide5 (C), maleimide5 (K), Malonyl (C), Malonyl (K), Malonyl (S), MBS+peptide (C), MDCC (C), MeMePhosphorothioate (S), Menadione (C), Menadione (K), Menadione-HQ (C), Menadione-HQ (K), MercaptoEthanol (S), MercaptoEthanol (T), MesitylOxide (H), MesitylOxide (K), MesitylOxide (Protein N-term), Met+O(2) (H), Met->Aha (M), Met->Ala (M), Met->Arg (M), Met->Asn (M), Met->Asp (M), Met->AspSA (M), Met->Cys (M), Met->Gln (M), Met->Glu (M), Met->Gly (M), Met->His (M), Met->Hpg (M), Met->Hse (C-term M), Met->Hsl (C-term M), Met->Lys (M), Met->Phe (M), Met->Pro (M), Met->Ser (M), Met->Thr (M), Met->Trp (M), Met->Tyr (M), Met->Val (M), Met->Xle (M), Met-loss (Protein N-term M), Met-loss+Acetyl (Protein N-term M), Methamidophos-O (C), Methamidophos-O (H), Methamidophos-O (K), Methamidophos-O (S), Methamidophos-O (T), Methamidophos-O (Y), Methamidophos-S (C), Methamidophos-S (H), Methamidophos-S (K), Methamidophos-S (S), Methamidophos-S (T), Methamidophos-S (Y), Methyl (C), Methyl (C-term), Methyl (D), Methyl (E), Methyl (H), Methyl (I), Methyl (K), Methyl (L), Methyl (N), Methyl (N-term), Methyl (Protein N-term), Methyl (Q), Methyl (R), Methyl (S), Methyl (T), Methyl+Acetyl:2H(3) (K), Methyl+Deamidated (N), Methyl+Deamidated (Q), Methyl-PEO12-Maleimide (C), Methyl:2H(2) (K), Methyl:2H(2) (N-term), Methyl:2H(2)13C (C), Methyl:2H(2)13C (C-term), Methyl:2H(2)13C (D), Methyl:2H(2)13C (E), Methyl:2H(2)13C (H), Methyl:2H(2)13C (I), Methyl:2H(2)13C (K), Methyl:2H(2)13C (L), Methyl:2H(2)13C (N), Methyl:2H(2)13C (N-term), Methyl:2H(2)13C (Protein N-term), Methyl:2H(2)13C (Q), Methyl:2H(2)13C (R), Methyl:2H(2)13C (S), Methyl:2H(2)13C (T), Methyl:2H(3) (D), Methyl:2H(3) (E), Methyl:2H(3) (K), Methyl:2H(3) (R), Methyl:2H(3) (X), Methyl:2H(3)+Acetyl:2H(3) (K), Methyl:2H(3)13C(1) (K), Methyl:2H(3)13C(1) (N-term), Methyl:2H(3)13C(1) (R), Methylamine (S), Methylamine (T), Methylmalonylation (S), methylol (K), methylol (W), methylol (Y), Methylphosphonate (S), Methylphosphonate (T), Methylphosphonate (Y), Methylpyrroline (K), methylsulfonylethyl (C), methylsulfonylethyl (H), methylsulfonylethyl (K), Methylthio (C), Methylthio (D), Methylthio (K), Methylthio (N), Methylthio (N-term), MG-H1 (R), Microcin (Protein C-term), MicrocinC7 (Protein C-term), MM-diphenylpentanone (C), Molybdopterin (C), MolybdopterinGD (C), MolybdopterinGD (D), MolybdopterinGD (U), MolybdopterinGD+Delta:S(-1)Se(1) (C), Mono_Ngamma-propargyl-L-Gln_desthiobiotin (C), monomethylphosphothione (C), monomethylphosphothione (H), monomethylphosphothione (K), monomethylphosphothione (S), monomethylphosphothione (T), monomethylphosphothione (Y), mTRAQ (H), mTRAQ (K), mTRAQ (N-term), mTRAQ (S), mTRAQ (T), mTRAQ (Y), mTRAQ:13C(3)15N(1) (H), mTRAQ:13C(3)15N(1) (K), mTRAQ:13C(3)15N(1) (N-term), mTRAQ:13C(3)15N(1) (S), mTRAQ:13C(3)15N(1) (T), mTRAQ:13C(3)15N(1) (Y), mTRAQ:13C(6)15N(2) (H), mTRAQ:13C(6)15N(2) (K), mTRAQ:13C(6)15N(2) (N-term), mTRAQ:13C(6)15N(2) (S), mTRAQ:13C(6)15N(2) (T), mTRAQ:13C(6)15N(2) (Y), MTSL (C), MurNAc (A), Myristoleyl (Protein N-term G), Myristoyl (C), Myristoyl (K), Myristoyl (N-term G), Myristoyl+Delta:H(-4) (Protein N-term G), N-dimethylphosphate (S), N6pAMP (S), N6pAMP (T), N6pAMP (Y), NA-LNO2 (C), NA-LNO2 (H), NA-OA-NO2 (C), NA-OA-NO2 (H), NBF (C), NBF (K), NBF (R), NBS (W), NBS:13C(6) (W), NDA (K), NDA (N-term), NEIAA (C), NEIAA (Y), NEIAA:2H(5) (C), NEIAA:2H(5) (Y), NEM:2H(5) (C), NEM:2H(5)+H2O (C), NEMsulfur (C), NEMsulfurWater (C), Nethylmaleimide (C), Nethylmaleimide+water (C), Nethylmaleimide+water (K), NeuAc (N), NeuAc (S), NeuAc (T), NeuGc (N), NeuGc (S), NeuGc (T), NHS-fluorescein (K), NHS-LC-Biotin (K), NHS-LC-Biotin (N-term), NIC (K), NIC (N-term), NIPCAM (C), Nitrene (Y), Nitro (F), Nitro (W), Nitro (Y), Nitrosyl (C), Nitrosyl (Y), Nmethylmaleimide (C), Nmethylmaleimide (K), Nmethylmaleimide+water (C), NO_SMX_SEMD (C), NO_SMX_SIMD (C), NP40 (N-term), NQIGG (K), NQTGG (K), O-Dimethylphosphate (S), O-Dimethylphosphate (T), O-Dimethylphosphate (Y), O-Et-N-diMePhospho (S), O-Isopropylmethylphosphonate (S), O-Isopropylmethylphosphonate (T), O-Isopropylmethylphosphonate (Y), O-Methylphosphate (S), O-Methylphosphate (T), O-Methylphosphate (Y), O-pinacolylmethylphosphonate (H), O-pinacolylmethylphosphonate (K), O-pinacolylmethylphosphonate (S), O-pinacolylmethylphosphonate (T), O-pinacolylmethylphosphonate (Y), Octanoyl (C), Octanoyl (S), Octanoyl (T), OxArgBiotin (R), OxArgBiotinRed (R), Oxidation (C), Oxidation (C-term G), Oxidation (D), Oxidation (E), Oxidation (F), Oxidation (H), Oxidation (I), Oxidation (K), Oxidation (L), Oxidation (M), Oxidation (N), Oxidation (P), Oxidation (Q), Oxidation (R), Oxidation (S), Oxidation (T), Oxidation (U), Oxidation (V), Oxidation (W), Oxidation (Y), Oxidation+NEM (C), OxLysBiotin (K), OxLysBiotinRed (K), OxProBiotin (P), OxProBiotinRed (P), Palmitoleyl (C), Palmitoleyl (S), Palmitoleyl (T), Palmitoyl (C), Palmitoyl (K), Palmitoyl (Protein N-term), Palmitoyl (S), Palmitoyl (T), PEITC (C), PEITC (K), PEITC (N-term), Pent(1)HexNAc(1) (S), Pent(1)HexNAc(1) (T), Pent(2) (S), Pent(2) (T), Pentanoyl (K), Pentose (S), Pentose (T), Pentylamine (Q), PEO-Iodoacetyl-LC-Biotin (C), PET (S), PET (T), Phe->Ala (F), Phe->Arg (F), Phe->Asn (F), Phe->Asp (F), Phe->CamCys (F), Phe->Cys (F), Phe->Gln (F), Phe->Glu (F), Phe->Gly (F), Phe->His (F), Phe->Lys (F), Phe->Met (F), Phe->Pro (F), Phe->Ser (F), Phe->Thr (F), Phe->Trp (F), Phe->Tyr (F), Phe->Val (F), Phe->Xle (F), phenyl-phosphate (K), phenyl-phosphate (S), phenyl-phosphate (T), phenyl-phosphate (Y), Phenylisocyanate (N-term), Phenylisocyanate:2H(5) (N-term), phenylsulfonylethyl (C), Phospho (C), Phospho (D), Phospho (E), Phospho (H), Phospho (K), Phospho (R), Phospho (S), Phospho (T), Phospho (Y), Phosphoadenosine (H), Phosphoadenosine (K), Phosphoadenosine (S), Phosphoadenosine (T), Phosphoadenosine (Y), PhosphoCytidine (S), PhosphoCytidine (T), PhosphoCytidine (Y), PhosphoDecoy (A), PhosphoDecoy (G), PhosphoDecoy (L), Phosphogluconoylation (K), Phosphogluconoylation (N-term), Phosphoguanosine (H), Phosphoguanosine (K), PhosphoHex (S), PhosphoHex (T), PhosphoHex(2) (N), PhosphoHex(2) (S), PhosphoHex(2) (T), PhosphoHexNAc (S), PhosphoHexNAc (T), Phosphopantetheine (S), Phosphopropargyl (S), Phosphopropargyl (T), Phosphopropargyl (Y), phosphoRibosyl (D), phosphoRibosyl (E), phosphoRibosyl (R), PhosphoribosyldephosphoCoA (S), PhosphoUridine (H), PhosphoUridine (Y), Phycocyanobilin (C), Phycoerythrobilin (C), Phytochromobilin (C), Piperidine (K), Piperidine (N-term), pRBS-ID_4-thiouridine (F), pRBS-ID_6-thioguanosine (W), Pro+O(2) (H), Pro->Ala (P), Pro->Arg (P), Pro->Asn (P), Pro->Asp (P), Pro->Cys (P), Pro->Gln (P), Pro->Glu (P), Pro->Gly (P), Pro->HAVA (P), Pro->His (P), Pro->Lys (P), Pro->Met (P), Pro->Phe (P), Pro->pyro-Glu (P), Pro->Pyrrolidinone (P), Pro->Pyrrolidone (P), Pro->Ser (P), Pro->Thr (P), Pro->Trp (P), Pro->Tyr (P), Pro->Val (P), Pro->Xle (P), probiotinhydrazide (P), Propargylamine (C-term), Propargylamine (D), Propargylamine (E), Propionamide (C), Propionamide (K), Propionamide (N-term), Propionamide:2H(3) (C), Propionyl (K), Propionyl (N-term), Propionyl (Protein N-term), Propionyl (S), Propionyl (T), Propionyl:13C(3) (K), Propionyl:13C(3) (N-term), Propiophenone (C), Propiophenone (H), Propiophenone (K), Propiophenone (R), Propiophenone (S), Propiophenone (T), Propiophenone (W), Propyl (C-term), Propyl (D), Propyl (E), Propyl (K), Propyl (N-term), Propyl (Protein C-term), Propyl:2H(6) (K), Propyl:2H(6) (N-term), PropylNAGthiazoline (C), PS_Hapten (C), PS_Hapten (H), PS_Hapten (K), pupylation (K), Puromycin (C-term), PyMIC (N-term), PyridoxalPhosphate (K), PyridoxalPhosphateH2 (K), Pyridylacetyl (K), Pyridylacetyl (N-term), Pyridylethyl (C), Pyro-carbamidomethyl (N-term C), Pyro-QQTGG (K), pyrophospho (S), pyrophospho (T), PyruvicAcidIminyl (K), PyruvicAcidIminyl (Protein N-term C), PyruvicAcidIminyl (Protein N-term V), Pyruvoyl (K), QAT (C), QAT:2H(3) (C), QEQTGG (K), QQQTGG (K), QQTGG (K), QTGG (K), Quinone (W), Quinone (Y), RBS-ID_Uridine (Y), Retinylidene (K), RNPXL (N-term K), RNPXL (N-term R), RNPXlink1 (C), s-GlcNAc (S), s-GlcNAc (T), Saligenin (H), Saligenin (K), Ser->Ala (S), Ser->Arg (S), Ser->Asn (S), Ser->Asp (S), Ser->Cys (S), Ser->Gln (S), Ser->Glu (S), Ser->Gly (S), Ser->His (S), Ser->LacticAcid (Protein N-term S), Ser->Lys (S), Ser->Met (S), Ser->Phe (S), Ser->Pro (S), Ser->Thr (S), Ser->Trp (S), Ser->Tyr (S), Ser->Val (S), Ser->Xle (S), Ser/Thr-KDO (S), Ser/Thr-KDO (T), serotonylation (Q), shTMT (K), shTMT (N-term), shTMT (Protein N-term), shTMTpro (K), shTMTpro (N-term), shTMTpro (Protein N-term), SMA (K), SMA (N-term), spermidine (Q), spermine (Q), SPITC (K), SPITC (N-term), SPITC:13C(6) (K), SPITC:13C(6) (N-term), Succinyl (K), Succinyl (N-term), Succinyl (Protein N-term), Succinyl:13C(4) (K), Succinyl:13C(4) (N-term), Succinyl:2H(4) (K), Succinyl:2H(4) (N-term), SulfanilicAcid (C-term), SulfanilicAcid (D), SulfanilicAcid (E), SulfanilicAcid:13C(6) (C-term), SulfanilicAcid:13C(6) (D), SulfanilicAcid:13C(6) (E), Sulfide (C), Sulfide (D), Sulfide (W), Sulfo (C), Sulfo (S), Sulfo (T), Sulfo (Y), sulfo+amino (Y), Sulfo-NHS-LC-LC-Biotin (K), Sulfo-NHS-LC-LC-Biotin (N-term), SulfoGMBS (C), SulfurDioxide (C), SUMO2135 (K), SUMO3549 (K), TAMRA-FP (S), TAMRA-FP (Y), Thiadiazole (C), Thiazolidine (C), Thiazolidine (F), Thiazolidine (H), Thiazolidine (K), Thiazolidine (Protein N-term), Thiazolidine (R), Thiazolidine (W), Thiazolidine (Y), thioacylPA (K), Thiophos-S-S-biotin (S), Thiophos-S-S-biotin (T), Thiophos-S-S-biotin (Y), Thiophospho (S), Thiophospho (T), Thiophospho (Y), Thr->Ala (T), Thr->Arg (T), Thr->Asn (T), Thr->Asp (T), Thr->Cys (T), Thr->Gln (T), Thr->Glu (T), Thr->Gly (T), Thr->His (T), Thr->Lys (T), Thr->Met (T), Thr->Phe (T), Thr->Pro (T), Thr->Ser (T), Thr->Trp (T), Thr->Tyr (T), Thr->Val (T), Thr->Xle (T), Thrbiotinhydrazide (T), Thyroxine (Y), Tiglyl (K), TMAB (K), TMAB (N-term), TMAB:2H(9) (K), TMAB:2H(9) (N-term), TMPP-Ac (K), TMPP-Ac (N-term), TMPP-Ac (Y), TMPP-Ac:13C(9) (K), TMPP-Ac:13C(9) (N-term), TMPP-Ac:13C(9) (Y), TMT (H), TMT (K), TMT (N-term), TMT (Protein N-term), TMT (S), TMT (T), TMT2plex (H), TMT2plex (K), TMT2plex (N-term), TMT2plex (Protein N-term), TMT2plex (S), TMT2plex (T), TMT6plex (H), TMT6plex (K), TMT6plex (N-term), TMT6plex (Protein N-term), TMT6plex (S), TMT6plex (T), TMTpro (H), TMTpro (K), TMTpro (N-term), TMTpro (Protein N-term), TMTpro (S), TMTpro (T), TMTpro_zero (H), TMTpro_zero (K), TMTpro_zero (N-term), TMTpro_zero (Protein N-term), TMTpro_zero (S), TMTpro_zero (T), TNBS (K), TNBS (N-term), trifluoro (L), Triiodo (Y), Triiodothyronine (Y), Trimethyl (K), Trimethyl (Protein N-term A), Trimethyl (R), Trimethyl:13C(3)2H(9) (K), Trimethyl:13C(3)2H(9) (R), Trimethyl:2H(9) (K), Trimethyl:2H(9) (R), Trioxidation (C), Trioxidation (F), Trioxidation (W), Trioxidation (Y), Tripalmitate (Protein N-term C), Tris (N), Triton (C-term), Triton (N-term), Trp->Ala (W), Trp->Arg (W), Trp->Asn (W), Trp->Asp (W), Trp->Cys (W), Trp->Gln (W), Trp->Glu (W), Trp->Gly (W), Trp->His (W), Trp->Hydroxykynurenin (W), Trp->Kynurenin (W), Trp->Lys (W), Trp->Met (W), Trp->Oxolactone (W), Trp->Phe (W), Trp->Pro (W), Trp->Ser (W), Trp->Thr (W), Trp->Tyr (W), Trp->Val (W), Trp->Xle (W), Tween20 (N-term), Tween80 (C-term), Tyr->Ala (Y), Tyr->Arg (Y), Tyr->Asn (Y), Tyr->Asp (Y), Tyr->Cys (Y), Tyr->Dha (Y), Tyr->Gln (Y), Tyr->Glu (Y), Tyr->Gly (Y), Tyr->His (Y), Tyr->Lys (Y), Tyr->Met (Y), Tyr->Phe (Y), Tyr->Pro (Y), Tyr->Ser (Y), Tyr->Thr (Y), Tyr->Trp (Y), Tyr->Val (Y), Tyr->Xle (Y), Ub-Br2 (C), Ub-fluorescein (C), Ub-VME (C), UgiJoullie (D), UgiJoullie (E), UgiJoullieProGly (D), UgiJoullieProGly (E), UgiJoullieProGlyProGly (D), UgiJoullieProGlyProGly (E), Unknown:162 (C-term), Unknown:162 (D), Unknown:162 (E), Unknown:162 (N-term), Unknown:177 (C-term), Unknown:177 (D), Unknown:177 (E), Unknown:177 (N-term), Unknown:210 (C-term), Unknown:210 (D), Unknown:210 (E), Unknown:210 (N-term), Unknown:216 (C-term), Unknown:216 (D), Unknown:216 (E), Unknown:216 (N-term), Unknown:234 (C-term), Unknown:234 (D), Unknown:234 (E), Unknown:234 (N-term), Unknown:248 (C-term), Unknown:248 (D), Unknown:248 (E), Unknown:248 (N-term), Unknown:250 (C-term), Unknown:250 (D), Unknown:250 (E), Unknown:250 (N-term), Unknown:302 (C-term), Unknown:302 (D), Unknown:302 (E), Unknown:302 (N-term), Unknown:306 (C-term), Unknown:306 (D), Unknown:306 (E), Unknown:306 (N-term), Unknown:420 (C-term), Unknown:420 (N-term), Val->Ala (V), Val->Arg (V), Val->Asn (V), Val->Asp (V), Val->Cys (V), Val->Gln (V), Val->Glu (V), Val->Gly (V), Val->His (V), Val->Lys (V), Val->Met (V), Val->Phe (V), Val->Pro (V), Val->Ser (V), Val->Thr (V), Val->Trp (V), Val->Tyr (V), Val->Xle (V), ValGly (K), VFQQQTGG (K), VIEVYQEQTGG (K), Withaferin (C), Xle->Ala (I), Xle->Ala (L), Xle->Arg (I), Xle->Arg (L), Xle->Asn (I), Xle->Asn (L), Xle->Asp (I), Xle->Asp (L), Xle->Cys (I), Xle->Cys (L), Xle->Gln (I), Xle->Gln (L), Xle->Glu (I), Xle->Glu (L), Xle->Gly (I), Xle->Gly (L), Xle->His (I), Xle->His (L), Xle->Lys (I), Xle->Lys (L), Xle->Met (I), Xle->Met (L), Xle->Phe (I), Xle->Phe (L), Xle->Pro (I), Xle->Pro (L), Xle->Ser (I), Xle->Ser (L), Xle->Thr (I), Xle->Thr (L), Xle->Trp (I), Xle->Trp (L), Xle->Tyr (I), Xle->Tyr (L), Xle->Val (I), Xle->Val (L), Xlink:B10621 (C), Xlink:BMOE (C), Xlink:BS2G[113] (K), Xlink:BS2G[113] (Protein N-term), Xlink:BS2G[114] (K), Xlink:BS2G[114] (Protein N-term), Xlink:BS2G[217] (K), Xlink:BS2G[217] (Protein N-term), Xlink:BS2G[96] (K), Xlink:BS2G[96] (Protein N-term), Xlink:BuUrBu[111] (K), Xlink:BuUrBu[111] (Protein N-term), Xlink:BuUrBu[111] (S), Xlink:BuUrBu[111] (T), Xlink:BuUrBu[111] (Y), Xlink:BuUrBu[196] (K), Xlink:BuUrBu[196] (Protein N-term), Xlink:BuUrBu[196] (S), Xlink:BuUrBu[196] (T), Xlink:BuUrBu[196] (Y), Xlink:BuUrBu[213] (K), Xlink:BuUrBu[213] (Protein N-term), Xlink:BuUrBu[213] (S), Xlink:BuUrBu[213] (T), Xlink:BuUrBu[213] (Y), Xlink:BuUrBu[214] (K), Xlink:BuUrBu[214] (Protein N-term), Xlink:BuUrBu[214] (S), Xlink:BuUrBu[214] (T), Xlink:BuUrBu[214] (Y), Xlink:BuUrBu[317] (K), Xlink:BuUrBu[317] (Protein N-term), Xlink:BuUrBu[317] (S), Xlink:BuUrBu[317] (T), Xlink:BuUrBu[317] (Y), Xlink:BuUrBu[85] (K), Xlink:BuUrBu[85] (Protein N-term), Xlink:BuUrBu[85] (S), Xlink:BuUrBu[85] (T), Xlink:BuUrBu[85] (Y), Xlink:DFDNB (K), Xlink:DFDNB (N), Xlink:DFDNB (Q), Xlink:DFDNB (R), Xlink:DMP[122] (K), Xlink:DMP[122] (Protein N-term), Xlink:DMP[139] (K), Xlink:DMP[139] (Protein N-term), Xlink:DMP[140] (K), Xlink:DMP[140] (Protein N-term), Xlink:DMP[154] (K), Xlink:DMP[154] (Protein N-term), Xlink:DSPP[210] (K), Xlink:DSPP[210] (Protein N-term), Xlink:DSPP[226] (K), Xlink:DSPP[226] (Protein N-term), Xlink:DSPP[228] (K), Xlink:DSPP[228] (Protein N-term), Xlink:DSPP[331] (K), Xlink:DSPP[331] (Protein N-term), Xlink:DSS[138] (K), Xlink:DSS[138] (Protein N-term), Xlink:DSS[155] (K), Xlink:DSS[155] (Protein N-term), Xlink:DSS[156] (K), Xlink:DSS[156] (Protein N-term), Xlink:DSS[259] (K), Xlink:DSS[259] (Protein N-term), Xlink:DSSO[104] (K), Xlink:DSSO[104] (Protein N-term), Xlink:DSSO[158] (K), Xlink:DSSO[158] (Protein N-term), Xlink:DSSO[175] (K), Xlink:DSSO[175] (Protein N-term), Xlink:DSSO[176] (K), Xlink:DSSO[176] (Protein N-term), Xlink:DSSO[279] (K), Xlink:DSSO[279] (Protein N-term), Xlink:DSSO[54] (K), Xlink:DSSO[54] (Protein N-term), Xlink:DSSO[86] (K), Xlink:DSSO[86] (Protein N-term), Xlink:DST[114] (K), Xlink:DST[114] (Protein N-term), Xlink:DST[132] (K), Xlink:DST[132] (Protein N-term), Xlink:DST[56] (K), Xlink:DST[56] (Protein N-term), Xlink:DTBP[172] (K), Xlink:DTBP[172] (Protein N-term), Xlink:DTBP[87] (K), Xlink:DTBP[87] (Protein N-term), Xlink:DTSSP[174] (K), Xlink:DTSSP[174] (Protein N-term), Xlink:DTSSP[192] (K), Xlink:DTSSP[192] (Protein N-term), Xlink:DTSSP[88] (K), Xlink:DTSSP[88] (Protein N-term), Xlink:EGS[115] (K), Xlink:EGS[115] (Protein N-term), Xlink:EGS[226] (K), Xlink:EGS[226] (Protein N-term), Xlink:EGS[244] (K), Xlink:EGS[244] (Protein N-term), Xlink:SMCC[219] (C), Xlink:SMCC[219] (K), Xlink:SMCC[219] (Protein N-term), Xlink:SMCC[237] (C), Xlink:SMCC[237] (K), Xlink:SMCC[237] (Protein N-term), Xlink:SMCC[321] (C), ZGB (K), ZGB (N-term), ZQG (K)

variable[Oxidation (M)] Variable modifications, specified using UniMod (www.unimod.org) terms, e.g. 'Oxidation (M)'. A terminus and a residue carry one modification each: a variable terminal modification (e.g. 'Acetyl (Protein N-term)', 'Gln->pyro-Glu (N-term Q)') is not searched where a fixed one sits on that terminus (e.g. 'TMT6plex (N-term)'), and a variable residue modification (e.g. 'Glutathione (C)') is not searched where a fixed one sits on that residue (e.g. 'Carbamidomethyl (C)').15N-oxobutanoic (N-term C), 15N-oxobutanoic (Protein N-term S), 15N-oxobutanoic (Protein N-term T), 2-dimethylsuccinyl (C), 2-methylbutyryl (K), 2-monomethylsuccinyl (C), 2-nitrobenzyl (Y), 2-succinyl (C), 2HPG (R), 2PCA-triazole-ethanethiol (N-term), 3-deoxyglucosone (R), 3-hydroxy-3-methylglutaryl (K), 3-hydroxybenzyl-phosphate (K), 3-hydroxybenzyl-phosphate (S), 3-hydroxybenzyl-phosphate (T), 3-hydroxybenzyl-phosphate (Y), 3-methylglutaconyl (K), 3-methylglutaryl (K), 3-phosphoglyceryl (K), 3sulfo (N-term), 4-ONE (C), 4-ONE (H), 4-ONE (K), 4-ONE+Delta:H(-2)O(-1) (C), 4-ONE+Delta:H(-2)O(-1) (H), 4-ONE+Delta:H(-2)O(-1) (K), 4AcAllylGal (C), 6C-CysPAT (C), 6C-CysPAT (D), 6C-CysPAT (E), 6C-CysPAT (H), 6C-CysPAT (K), 6C-CysPAT (N-term), 6C-CysPAT (S), 6C-CysPAT (T), 6C-CysPAT (Y), a-type-ion (C-term), AccQTag (K), AccQTag (N-term), Acetoacetyl (K), Acetyl (C), Acetyl (H), Acetyl (K), Acetyl (N-term), Acetyl (Protein N-term), Acetyl (R), Acetyl (S), Acetyl (T), Acetyl (Y), Acetyl:13C(2) (K), Acetyl:13C(2) (Protein N-term), Acetyl:2H(3) (H), Acetyl:2H(3) (K), Acetyl:2H(3) (N-term), Acetyl:2H(3) (Protein N-term), Acetyl:2H(3) (S), Acetyl:2H(3) (T), Acetyl:2H(3) (Y), Acetyldeoxyhypusine (K), Acetylhypusine (K), ADP-Ribosyl (C), ADP-Ribosyl (D), ADP-Ribosyl (E), ADP-Ribosyl (K), ADP-Ribosyl (N), ADP-Ribosyl (R), ADP-Ribosyl (S), ADP-Ribosyl (T), AEBS (H), AEBS (K), AEBS (Protein N-term), AEBS (S), AEBS (Y), AEC-MAEC (S), AEC-MAEC (T), AEC-MAEC:2H(4) (S), AEC-MAEC:2H(4) (T), AFB1_Dialdehyde (K), AHA-Alkyne (M), AHA-Alkyne-KDDDD (M), AHA-SS (M), AHA-SS_CAM (M), Ahx2+Hsl (C-term), Ala->Arg (A), Ala->Asn (A), Ala->Asp (A), Ala->Cys (A), Ala->Gln (A), Ala->Glu (A), Ala->Gly (A), Ala->His (A), Ala->Lys (A), Ala->Met (A), Ala->Phe (A), Ala->Pro (A), Ala->Ser (A), Ala->Thr (A), Ala->Trp (A), Ala->Tyr (A), Ala->Val (A), Ala->Xle (A), Amidated (C-term), Amidated (Protein C-term), Amidine (K), Amidine (N-term), Amidino (C), Amino (Y), Ammonia-loss (N), Ammonia-loss (N-term C), Ammonia-loss (Protein N-term S), Ammonia-loss (Protein N-term T), Ammonium (C-term), Ammonium (D), Ammonium (E), AMTzHexNAc2 (N), AMTzHexNAc2 (S), AMTzHexNAc2 (T), Andro-H2O (C), Archaeol (C), Arg (N-term), Arg->Ala (R), Arg->Asn (R), Arg->Asp (R), Arg->Cys (R), Arg->Gln (R), Arg->Glu (R), Arg->GluSA (R), Arg->Gly (R), Arg->His (R), Arg->Lys (R), Arg->Met (R), Arg->Npo (R), Arg->Orn (R), Arg->Phe (R), Arg->Pro (R), Arg->Ser (R), Arg->Thr (R), Arg->Trp (R), Arg->Tyr (R), Arg->Val (R), Arg->Xle (R), Arg-loss (C-term R), Arg2PG (R), Argbiotinhydrazide (R), AROD (C), Asn->Ala (N), Asn->Arg (N), Asn->Asp (N), Asn->Cys (N), Asn->Gln (N), Asn->Glu (N), Asn->Gly (N), Asn->His (N), Asn->Lys (N), Asn->Met (N), Asn->Phe (N), Asn->Pro (N), Asn->Ser (N), Asn->Thr (N), Asn->Trp (N), Asn->Tyr (N), Asn->Val (N), Asn->Xle (N), Asp->Ala (D), Asp->Arg (D), Asp->Asn (D), Asp->Cys (D), Asp->Gln (D), Asp->Glu (D), Asp->Gly (D), Asp->His (D), Asp->Lys (D), Asp->Met (D), Asp->Phe (D), Asp->Pro (D), Asp->Ser (D), Asp->Thr (D), Asp->Trp (D), Asp->Tyr (D), Asp->Val (D), Asp->Xle (D), Aspartylurea (H), Atto495Maleimide (C), AzidoF (F), azole (C), azole (S), Bacillosamine (N), BADGE (C), BDMAPP (H), BDMAPP (K), BDMAPP (Protein N-term), BDMAPP (W), BDMAPP (Y), BEMAD_C (C), BEMAD_C:2H(6) (C), BEMAD_ST (S), BEMAD_ST (T), BEMAD_ST:2H(6) (S), BEMAD_ST:2H(6) (T), Benzoyl (K), Benzoyl (N-term), benzylguanidine (K), betaFNA (C), betaFNA (K), BHT (C), BHT (H), BHT (K), BHTOH (C), BHTOH (H), BHTOH (K), Biotin (K), Biotin (N-term), Biotin-HPDP (C), Biotin-PEG-PRA (M), Biotin-PEO-Amine (D), Biotin-PEO-Amine (E), Biotin-PEO-Amine (Protein C-term), Biotin-phenacyl (C), Biotin-phenacyl (H), Biotin-phenacyl (S), Biotin-tyramide (C), Biotin-tyramide (W), Biotin-tyramide (Y), Biotin:Aha-DADPS (M), Biotin:Aha-PC (M), Biotin:Cayman-10013 (C), Biotin:Cayman-10141 (C), Biotin:Invitrogen-M1602 (C), Biotin:Sigma-B1267 (C), Biotin:Thermo-21325 (K), Biotin:Thermo-21328 (K), Biotin:Thermo-21328 (N-term), Biotin:Thermo-21330 (K), Biotin:Thermo-21330 (N-term), Biotin:Thermo-21345 (Q), Biotin:Thermo-21360 (X), Biotin:Thermo-21901+2H2O (C), Biotin:Thermo-21901+H2O (C), Biotin:Thermo-21911 (C), Biotin:Thermo-33033 (X), Biotin:Thermo-33033-H (X), Biotin:Thermo-88310 (K), Biotin:Thermo-88317 (S), Biotin:Thermo-88317 (Y), biotinAcrolein298 (C), biotinAcrolein298 (H), biotinAcrolein298 (K), biotinAcrolein298 (Protein N-term), BisANS (K), bisANS-sulfonates (K), bisANS-sulfonates (S), bisANS-sulfonates (T), BITC (C), BITC (K), BITC (N-term), BMP-piperidinol (C), BMP-piperidinol (M), Brij35 (N-term), Brij58 (N-term), Bromo (F), Bromo (H), Bromo (W), Bromo (Y), Bromobimane (C), Butyryl (K), C8-QAT (K), C8-QAT (N-term), CAF (N-term), CAMthiopropanoyl (K), CAMthiopropanoyl (Protein N-term), Can-FP-biotin (S), Can-FP-biotin (T), Can-FP-biotin (Y), Carbamidomethyl (C), Carbamidomethyl (D), Carbamidomethyl (E), Carbamidomethyl (H), Carbamidomethyl (K), Carbamidomethyl (M), Carbamidomethyl (N-term), Carbamidomethyl (S), Carbamidomethyl (T), Carbamidomethyl (U), Carbamidomethyl (Y), CarbamidomethylDTT (C), Carbamyl (C), Carbamyl (K), Carbamyl (M), Carbamyl (N-term), Carbamyl (Protein N-term), Carbamyl (R), Carbamyl (S), Carbamyl (T), Carbamyl (Y), Carbofuran (S), Carbonyl (A), Carbonyl (E), Carbonyl (I), Carbonyl (L), Carbonyl (Q), Carbonyl (R), Carbonyl (S), Carbonyl (V), Carboxy (D), Carboxy (E), Carboxy (K), Carboxy (Protein N-term M), Carboxy (W), Carboxy->Thiocarboxy (Protein C-term G), Carboxyethyl (H), Carboxyethyl (K), Carboxyethylpyrrole (K), Carboxymethyl (C), Carboxymethyl (K), Carboxymethyl (N-term), Carboxymethyl (U), Carboxymethyl (W), Carboxymethyl:13C(2) (C), CarboxymethylDMAP (N-term), CarboxymethylDTT (C), Cation:Ag (C-term), Cation:Ag (D), Cation:Ag (E), Cation:Al[III] (C-term), Cation:Al[III] (D), Cation:Al[III] (E), Cation:Ca[II] (C-term), Cation:Ca[II] (D), Cation:Ca[II] (E), Cation:Cu[I] (C-term), Cation:Cu[I] (D), Cation:Cu[I] (E), Cation:Cu[I] (H), Cation:Fe[II] (C-term), Cation:Fe[II] (D), Cation:Fe[II] (E), Cation:Fe[III] (C-term), Cation:Fe[III] (D), Cation:Fe[III] (E), Cation:K (C-term), Cation:K (D), Cation:K (E), Cation:Li (C-term), Cation:Li (D), Cation:Li (E), Cation:Mg[II] (C-term), Cation:Mg[II] (D), Cation:Mg[II] (E), Cation:Na (C-term), Cation:Na (D), Cation:Na (E), Cation:Ni[II] (C-term), Cation:Ni[II] (D), Cation:Ni[II] (E), Cation:Zn[II] (C-term), Cation:Zn[II] (D), Cation:Zn[II] (E), Cation:Zn[II] (H), cGMP (C), cGMP (S), cGMP+RMP-loss (C), cGMP+RMP-loss (S), CHDH (D), Chlorination (W), Chlorination (Y), Cholesterol (Protein C-term), CIGG (K), CLIP_TRAQ_2 (K), CLIP_TRAQ_2 (N-term), CLIP_TRAQ_2 (Y), CLIP_TRAQ_3 (K), CLIP_TRAQ_3 (N-term), CLIP_TRAQ_3 (Y), CLIP_TRAQ_4 (K), CLIP_TRAQ_4 (N-term), CLIP_TRAQ_4 (Y), CoenzymeA (C), Cresylphosphate (H), Cresylphosphate (K), Cresylphosphate (R), Cresylphosphate (S), Cresylphosphate (T), Cresylphosphate (Y), CresylSaligeninPhosphate (H), CresylSaligeninPhosphate (K), CresylSaligeninPhosphate (R), CresylSaligeninPhosphate (S), CresylSaligeninPhosphate (T), CresylSaligeninPhosphate (Y), Crotonaldehyde (C), Crotonaldehyde (H), Crotonaldehyde (K), Crotonyl (K), CuSMo (C), CUSTOM0 (A), CUSTOM0 (C), CUSTOM0 (C-term), CUSTOM0 (D), CUSTOM0 (E), CUSTOM0 (F), CUSTOM0 (G), CUSTOM0 (H), CUSTOM0 (I), CUSTOM0 (K), CUSTOM0 (L), CUSTOM0 (M), CUSTOM0 (N), CUSTOM0 (N-term), CUSTOM0 (P), CUSTOM0 (Q), CUSTOM0 (R), CUSTOM0 (S), CUSTOM0 (T), CUSTOM0 (V), CUSTOM0 (W), CUSTOM0 (Y), CUSTOM1 (A), CUSTOM1 (C), CUSTOM1 (C-term), CUSTOM1 (D), CUSTOM1 (E), CUSTOM1 (F), CUSTOM1 (G), CUSTOM1 (H), CUSTOM1 (I), CUSTOM1 (K), CUSTOM1 (L), CUSTOM1 (M), CUSTOM1 (N), CUSTOM1 (N-term), CUSTOM1 (P), CUSTOM1 (Q), CUSTOM1 (R), CUSTOM1 (S), CUSTOM1 (T), CUSTOM1 (V), CUSTOM1 (W), CUSTOM1 (Y), CUSTOM2 (A), CUSTOM2 (C), CUSTOM2 (C-term), CUSTOM2 (D), CUSTOM2 (E), CUSTOM2 (F), CUSTOM2 (G), CUSTOM2 (H), CUSTOM2 (I), CUSTOM2 (K), CUSTOM2 (L), CUSTOM2 (M), CUSTOM2 (N), CUSTOM2 (N-term), CUSTOM2 (P), CUSTOM2 (Q), CUSTOM2 (R), CUSTOM2 (S), CUSTOM2 (T), CUSTOM2 (V), CUSTOM2 (W), CUSTOM2 (Y), CUSTOM3 (A), CUSTOM3 (C), CUSTOM3 (C-term), CUSTOM3 (D), CUSTOM3 (E), CUSTOM3 (F), CUSTOM3 (G), CUSTOM3 (H), CUSTOM3 (I), CUSTOM3 (K), CUSTOM3 (L), CUSTOM3 (M), CUSTOM3 (N), CUSTOM3 (N-term), CUSTOM3 (P), CUSTOM3 (Q), CUSTOM3 (R), CUSTOM3 (S), CUSTOM3 (T), CUSTOM3 (V), CUSTOM3 (W), CUSTOM3 (Y), CUSTOM4 (A), CUSTOM4 (C), CUSTOM4 (C-term), CUSTOM4 (D), CUSTOM4 (E), CUSTOM4 (F), CUSTOM4 (G), CUSTOM4 (H), CUSTOM4 (I), CUSTOM4 (K), CUSTOM4 (L), CUSTOM4 (M), CUSTOM4 (N), CUSTOM4 (N-term), CUSTOM4 (P), CUSTOM4 (Q), CUSTOM4 (R), CUSTOM4 (S), CUSTOM4 (T), CUSTOM4 (V), CUSTOM4 (W), CUSTOM4 (Y), CUSTOM5 (A), CUSTOM5 (C), CUSTOM5 (C-term), CUSTOM5 (D), CUSTOM5 (E), CUSTOM5 (F), CUSTOM5 (G), CUSTOM5 (H), CUSTOM5 (I), CUSTOM5 (K), CUSTOM5 (L), CUSTOM5 (M), CUSTOM5 (N), CUSTOM5 (N-term), CUSTOM5 (P), CUSTOM5 (Q), CUSTOM5 (R), CUSTOM5 (S), CUSTOM5 (T), CUSTOM5 (V), CUSTOM5 (W), CUSTOM5 (Y), CUSTOM6 (A), CUSTOM6 (C), CUSTOM6 (C-term), CUSTOM6 (D), CUSTOM6 (E), CUSTOM6 (F), CUSTOM6 (G), CUSTOM6 (H), CUSTOM6 (I), CUSTOM6 (K), CUSTOM6 (L), CUSTOM6 (M), CUSTOM6 (N), CUSTOM6 (N-term), CUSTOM6 (P), CUSTOM6 (Q), CUSTOM6 (R), CUSTOM6 (S), CUSTOM6 (T), CUSTOM6 (V), CUSTOM6 (W), CUSTOM6 (Y), CUSTOM7 (A), CUSTOM7 (C), CUSTOM7 (C-term), CUSTOM7 (D), CUSTOM7 (E), CUSTOM7 (F), CUSTOM7 (G), CUSTOM7 (H), CUSTOM7 (I), CUSTOM7 (K), CUSTOM7 (L), CUSTOM7 (M), CUSTOM7 (N), CUSTOM7 (N-term), CUSTOM7 (P), CUSTOM7 (Q), CUSTOM7 (R), CUSTOM7 (S), CUSTOM7 (T), CUSTOM7 (V), CUSTOM7 (W), CUSTOM7 (Y), CUSTOM8 (A), CUSTOM8 (C), CUSTOM8 (C-term), CUSTOM8 (D), CUSTOM8 (E), CUSTOM8 (F), CUSTOM8 (G), CUSTOM8 (H), CUSTOM8 (I), CUSTOM8 (K), CUSTOM8 (L), CUSTOM8 (M), CUSTOM8 (N), CUSTOM8 (N-term), CUSTOM8 (P), CUSTOM8 (Q), CUSTOM8 (R), CUSTOM8 (S), CUSTOM8 (T), CUSTOM8 (V), CUSTOM8 (W), CUSTOM8 (Y), CUSTOM9 (A), CUSTOM9 (C), CUSTOM9 (C-term), CUSTOM9 (D), CUSTOM9 (E), CUSTOM9 (F), CUSTOM9 (G), CUSTOM9 (H), CUSTOM9 (I), CUSTOM9 (K), CUSTOM9 (L), CUSTOM9 (M), CUSTOM9 (N), CUSTOM9 (N-term), CUSTOM9 (P), CUSTOM9 (Q), CUSTOM9 (R), CUSTOM9 (S), CUSTOM9 (T), CUSTOM9 (V), CUSTOM9 (W), CUSTOM9 (Y), Cy3-maleimide (C), Cy3b-maleimide (C), Cyano (C), CyDye-Cy3 (C), CyDye-Cy5 (C), Cys->Ala (C), Cys->Arg (C), Cys->Asn (C), Cys->Asp (C), Cys->CamSec (C), Cys->Dha (C), Cys->ethylaminoAla (C), Cys->Gln (C), Cys->Glu (C), Cys->Gly (C), Cys->His (C), Cys->Lys (C), Cys->Met (C), Cys->methylaminoAla (C), Cys->Oxoalanine (C), Cys->Phe (C), Cys->Pro (C), Cys->PyruvicAcid (Protein N-term C), Cys->SecNEM (C), Cys->SecNEM:2H(5) (C), Cys->Ser (C), Cys->Thr (C), Cys->Trp (C), Cys->Tyr (C), Cys->Val (C), Cys->Xle (C), Cysteinyl (C), cysTMT (C), cysTMT6plex (C), Cytopiloyne (C), Cytopiloyne (K), Cytopiloyne (N-term), Cytopiloyne (P), Cytopiloyne (R), Cytopiloyne (S), Cytopiloyne (Y), Cytopiloyne+water (C), Cytopiloyne+water (K), Cytopiloyne+water (N-term), Cytopiloyne+water (R), Cytopiloyne+water (S), Cytopiloyne+water (T), Cytopiloyne+water (Y), DABCYL-C2-maleimide (C), DABCYL-C2-maleimide (K), DAET (S), DAET (T), Dansyl (K), Dansyl (N-term), Dap-DSP (A), Dap-DSP (E), Dap-DSP (K), DBIA (C), DCP (C), Deamidated (N), Deamidated (Protein N-term F), Deamidated (Q), Deamidated (R), Deamidated:18O(1) (N), Deamidated:18O(1) (Q), Decanoyl (S), Decanoyl (T), Decarboxylation (D), Decarboxylation (E), DEDGFLYMVYASQETFG (K), Dehydrated (D), Dehydrated (N-term C), Dehydrated (Protein C-term N), Dehydrated (Protein C-term Q), Dehydrated (S), Dehydrated (T), Dehydrated (Y), Dehydro (C), Delta:H(-1)N(-1)18O(1) (N), Delta:H(-4)O(2) (W), Delta:H(-4)O(3) (W), Delta:H(10)C(8)O(1) (K), Delta:H(2)C(2) (H), Delta:H(2)C(2) (K), Delta:H(2)C(2) (N-term), Delta:H(2)C(2) (Protein N-term), Delta:H(2)C(3) (K), Delta:H(2)C(3)O(1) (K), Delta:H(2)C(3)O(1) (R), Delta:H(2)C(5) (K), Delta:H(4)C(2) (H), Delta:H(4)C(2) (K), Delta:H(4)C(2) (N-term), Delta:H(4)C(2)O(-1)S(1) (S), Delta:H(4)C(3) (H), Delta:H(4)C(3) (K), Delta:H(4)C(3) (Protein N-term), Delta:H(4)C(3)O(1) (C), Delta:H(4)C(3)O(1) (H), Delta:H(4)C(3)O(1) (K), Delta:H(4)C(3)O(1) (R), Delta:H(4)C(3)O(2) (K), Delta:H(4)C(5)O(1) (R), Delta:H(4)C(6) (K), Delta:H(5)C(2) (P), Delta:H(6)C(3)O(1) (C), Delta:H(6)C(3)O(1) (H), Delta:H(6)C(3)O(1) (K), Delta:H(6)C(3)O(1) (Protein N-term), Delta:H(6)C(6)O(1) (K), Delta:H(6)C(7)O(4) (R), Delta:H(8)C(6)O(1) (K), Delta:H(8)C(6)O(1) (Protein N-term), Delta:H(8)C(6)O(2) (K), Delta:Hg(1) (C), Delta:O(4) (W), Delta:S(-1)Se(1) (C), Delta:S(-1)Se(1) (M), Delta:Se(1) (C), Deoxy (D), Deoxy (S), Deoxy (T), Deoxyhypusine (K), Deoxyhypusine (Q), DeStreak (C), Dethiomethyl (M), dHex (N), dHex (S), dHex (T), dHex(1)Hex(1) (S), dHex(1)Hex(1) (T), dHex(1)Hex(1)HexA(1)HexNAc(3) (S), dHex(1)Hex(1)HexA(1)HexNAc(3) (T), dHex(1)Hex(1)HexNAc(1)Kdn(1) (S), dHex(1)Hex(1)HexNAc(1)Kdn(1) (T), dHex(1)Hex(1)HexNAc(1)NeuAc(1) (S), dHex(1)Hex(1)HexNAc(1)NeuAc(1) (T), dHex(1)Hex(1)HexNAc(1)NeuGc(1) (S), dHex(1)Hex(1)HexNAc(1)NeuGc(1) (T), dHex(1)Hex(1)HexNAc(2)Kdn(1) (S), dHex(1)Hex(1)HexNAc(2)Kdn(1) (T), dHex(1)Hex(1)HexNAc(2)NeuAc(1) (S), dHex(1)Hex(1)HexNAc(2)NeuAc(1) (T), dHex(1)Hex(1)HexNAc(2)NeuAc(1)Sulf(1) (S), dHex(1)Hex(1)HexNAc(2)NeuAc(1)Sulf(1) (T), dHex(1)Hex(1)HexNAc(2)NeuAc(2) (S), dHex(1)Hex(1)HexNAc(2)NeuAc(2) (T), dHex(1)Hex(1)HexNAc(2)Sulf(1) (S), dHex(1)Hex(1)HexNAc(2)Sulf(1) (T), dHex(1)Hex(1)HexNAc(3) (S), dHex(1)Hex(1)HexNAc(3) (T), dHex(1)Hex(1)HexNAc(3)NeuAc(1) (S), dHex(1)Hex(1)HexNAc(3)NeuAc(1) (T), dHex(1)Hex(1)HexNAc(3)NeuAc(1)Sulf(1) (S), dHex(1)Hex(1)HexNAc(3)NeuAc(1)Sulf(1) (T), dHex(1)Hex(1)HexNAc(3)NeuGc(1) (S), dHex(1)Hex(1)HexNAc(3)NeuGc(1) (T), dHex(1)Hex(1)HexNAc(3)Sulf(1) (S), dHex(1)Hex(1)HexNAc(3)Sulf(1) (T), dHex(1)Hex(1)HexNAc(4) (S), dHex(1)Hex(1)HexNAc(4) (T), dHex(1)Hex(2) (S), dHex(1)Hex(2) (T), dHex(1)Hex(2)HexA(1) (S), dHex(1)Hex(2)HexA(1) (T), dHex(1)Hex(2)HexA(1)HexNAc(1) (S), dHex(1)Hex(2)HexA(1)HexNAc(1) (T), dHex(1)Hex(2)HexA(1)HexNAc(1)Sulf(1) (S), dHex(1)Hex(2)HexA(1)HexNAc(1)Sulf(1) (T), dHex(1)Hex(2)HexA(1)HexNAc(2) (S), dHex(1)Hex(2)HexA(1)HexNAc(2) (T), dHex(1)Hex(2)HexNAc(1) (S), dHex(1)Hex(2)HexNAc(1) (T), dHex(1)Hex(2)HexNAc(1)NeuAc(2) (S), dHex(1)Hex(2)HexNAc(1)NeuAc(2) (T), dHex(1)Hex(2)HexNAc(1)Sulf(1) (S), dHex(1)Hex(2)HexNAc(1)Sulf(1) (T), dHex(1)Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (S), dHex(1)Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (T), dHex(1)Hex(2)HexNAc(2)NeuAc(2) (S), dHex(1)Hex(2)HexNAc(2)NeuAc(2) (T), dHex(1)Hex(2)HexNAc(2)NeuAc(2)Sulf(1) (S), dHex(1)Hex(2)HexNAc(2)NeuAc(2)Sulf(1) (T), dHex(1)Hex(2)HexNAc(2)NeuGc(1) (N), dHex(1)Hex(2)HexNAc(2)NeuGc(1) (S), dHex(1)Hex(2)HexNAc(2)NeuGc(1) (T), dHex(1)Hex(2)HexNAc(2)NeuGc(2) (S), dHex(1)Hex(2)HexNAc(2)NeuGc(2) (T), dHex(1)Hex(2)HexNAc(2)NeuGc(3) (S), dHex(1)Hex(2)HexNAc(2)NeuGc(3) (T), dHex(1)Hex(2)HexNAc(2)Pent(1) (N), dHex(1)Hex(2)HexNAc(2)Sulf(1) (S), dHex(1)Hex(2)HexNAc(2)Sulf(1) (T), dHex(1)Hex(2)HexNAc(3) (N), dHex(1)Hex(2)HexNAc(3) (S), dHex(1)Hex(2)HexNAc(3) (T), dHex(1)Hex(2)HexNAc(3)NeuAc(1) (S), dHex(1)Hex(2)HexNAc(3)NeuAc(1) (T), dHex(1)Hex(2)HexNAc(3)NeuAc(1)Sulf(1) (S), dHex(1)Hex(2)HexNAc(3)NeuAc(1)Sulf(1) (T), dHex(1)Hex(2)HexNAc(3)Sulf(1) (S), dHex(1)Hex(2)HexNAc(3)Sulf(1) (T), dHex(1)Hex(2)HexNAc(4) (N), dHex(1)Hex(2)HexNAc(4) (S), dHex(1)Hex(2)HexNAc(4) (T), dHex(1)Hex(2)HexNAc(4)NeuAc(1) (S), dHex(1)Hex(2)HexNAc(4)NeuAc(1) (T), dHex(1)Hex(2)HexNAc(4)NeuAc(2) (S), dHex(1)Hex(2)HexNAc(4)NeuAc(2) (T), dHex(1)Hex(2)HexNAc(4)Sulf(2) (S), dHex(1)Hex(2)HexNAc(4)Sulf(2) (T), dHex(1)Hex(3) (S), dHex(1)Hex(3) (T), dHex(1)Hex(3)HexA(1)HexNAc(1) (S), dHex(1)Hex(3)HexA(1)HexNAc(1) (T), dHex(1)Hex(3)HexA(1)HexNAc(1)Sulf(1) (S), dHex(1)Hex(3)HexA(1)HexNAc(1)Sulf(1) (T), dHex(1)Hex(3)HexA(1)HexNAc(2) (S), dHex(1)Hex(3)HexA(1)HexNAc(2) (T), dHex(1)Hex(3)HexA(1)HexNAc(2)Sulf(1) (S), dHex(1)Hex(3)HexA(1)HexNAc(2)Sulf(1) (T), dHex(1)Hex(3)HexA(1)HexNAc(3)Sulf(1) (S), dHex(1)Hex(3)HexA(1)HexNAc(3)Sulf(1) (T), dHex(1)Hex(3)HexA(2)HexNAc(2) (S), dHex(1)Hex(3)HexA(2)HexNAc(2) (T), dHex(1)Hex(3)HexNAc(1) (S), dHex(1)Hex(3)HexNAc(1) (T), dHex(1)Hex(3)HexNAc(1)Sulf(1) (S), dHex(1)Hex(3)HexNAc(1)Sulf(1) (T), dHex(1)Hex(3)HexNAc(2) (N), dHex(1)Hex(3)HexNAc(2) (S), dHex(1)Hex(3)HexNAc(2) (T), dHex(1)Hex(3)HexNAc(2)NeuGc(1) (S), dHex(1)Hex(3)HexNAc(2)NeuGc(1) (T), dHex(1)Hex(3)HexNAc(2)Pent(1) (N), dHex(1)Hex(3)HexNAc(2)Sulf(1) (N), dHex(1)Hex(3)HexNAc(2)Sulf(1) (S), dHex(1)Hex(3)HexNAc(2)Sulf(1) (T), dHex(1)Hex(3)HexNAc(3) (N), dHex(1)Hex(3)HexNAc(3) (S), dHex(1)Hex(3)HexNAc(3) (T), dHex(1)Hex(3)HexNAc(3)NeuAc(2) (S), dHex(1)Hex(3)HexNAc(3)NeuAc(2) (T), dHex(1)Hex(3)HexNAc(3)Pent(1) (N), dHex(1)Hex(3)HexNAc(3)Pent(2) (N), dHex(1)Hex(3)HexNAc(3)Pent(3) (N), dHex(1)Hex(3)HexNAc(3)Sulf(1) (S), dHex(1)Hex(3)HexNAc(3)Sulf(1) (T), dHex(1)Hex(3)HexNAc(4) (N), dHex(1)Hex(3)HexNAc(4) (S), dHex(1)Hex(3)HexNAc(4) (T), dHex(1)Hex(3)HexNAc(4)NeuAc(1) (N), dHex(1)Hex(3)HexNAc(4)Pent(1) (N), dHex(1)Hex(3)HexNAc(4)Pent(2) (N), dHex(1)Hex(3)HexNAc(4)Pent(3) (N), dHex(1)Hex(3)HexNAc(4)Sulf(1) (N), dHex(1)Hex(3)HexNAc(5) (N), dHex(1)Hex(3)HexNAc(5) (S), dHex(1)Hex(3)HexNAc(5) (T), dHex(1)Hex(3)HexNAc(5)NeuAc(1) (N), dHex(1)Hex(3)HexNAc(5)NeuAc(1) (S), dHex(1)Hex(3)HexNAc(5)NeuAc(1) (T), dHex(1)Hex(3)HexNAc(5)Sulf(1) (N), dHex(1)Hex(3)HexNAc(6) (N), dHex(1)Hex(3)HexNAc(6) (S), dHex(1)Hex(3)HexNAc(6) (T), dHex(1)Hex(3)HexNAc(6)Sulf(1) (N), dHex(1)Hex(4) (S), dHex(1)Hex(4) (T), dHex(1)Hex(4)HexA(1) (S), dHex(1)Hex(4)HexA(1) (T), dHex(1)Hex(4)HexA(1)HexNAc(2) (S), dHex(1)Hex(4)HexA(1)HexNAc(2) (T), dHex(1)Hex(4)HexA(1)HexNAc(3)Sulf(1) (S), dHex(1)Hex(4)HexA(1)HexNAc(3)Sulf(1) (T), dHex(1)Hex(4)HexNAc(1)Pent(1) (N), dHex(1)Hex(4)HexNAc(2) (N), dHex(1)Hex(4)HexNAc(2) (S), dHex(1)Hex(4)HexNAc(2) (T), dHex(1)Hex(4)HexNAc(2)Pent(1) (N), dHex(1)Hex(4)HexNAc(3) (N), dHex(1)Hex(4)HexNAc(3)NeuAc(1) (N), dHex(1)Hex(4)HexNAc(3)NeuAc(1) (S), dHex(1)Hex(4)HexNAc(3)NeuAc(1) (T), dHex(1)Hex(4)HexNAc(3)NeuAc(1)Sulf(1) (N), dHex(1)Hex(4)HexNAc(3)NeuGc(1) (N), dHex(1)Hex(4)HexNAc(3)Pent(1) (N), dHex(1)Hex(4)HexNAc(3)Sulf(1) (N), dHex(1)Hex(4)HexNAc(4) (N), dHex(1)Hex(4)HexNAc(4) (S), dHex(1)Hex(4)HexNAc(4) (T), dHex(1)Hex(4)HexNAc(4)NeuAc(1) (N), dHex(1)Hex(4)HexNAc(4)NeuAc(1) (S), dHex(1)Hex(4)HexNAc(4)NeuAc(1) (T), dHex(1)Hex(4)HexNAc(4)NeuAc(1)Sulf(1) (N), dHex(1)Hex(4)HexNAc(4)Pent(1) (N), dHex(1)Hex(4)HexNAc(4)Sulf(1) (N), dHex(1)Hex(4)HexNAc(5) (N), dHex(1)Hex(4)HexNAc(5)Sulf(1) (N), dHex(1)Hex(5) (S), dHex(1)Hex(5) (T), dHex(1)Hex(5)HexA(1)HexNAc(3)Sulf(1) (N), dHex(1)Hex(5)HexA(1)HexNAc(3)Sulf(2) (N), dHex(1)Hex(5)HexNAc(2) (N), dHex(1)Hex(5)HexNAc(2)Pent(1) (N), dHex(1)Hex(5)HexNAc(3) (N), dHex(1)Hex(5)HexNAc(3)NeuAc(1) (N), dHex(1)Hex(5)HexNAc(3)NeuAc(1)Sulf(1) (N), dHex(1)Hex(5)HexNAc(3)NeuGc(1) (N), dHex(1)Hex(5)HexNAc(3)NeuGc(1)Sulf(1) (N), dHex(1)Hex(5)HexNAc(3)Sulf(1) (N), dHex(1)Hex(5)HexNAc(4) (N), dHex(1)Hex(5)HexNAc(4)Me(2)Pent(1) (N), dHex(1)Hex(5)HexNAc(4)NeuAc(1) (N), dHex(1)Hex(5)HexNAc(4)NeuAc(2) (N), dHex(1)Hex(5)HexNAc(4)Pent(1) (N), dHex(1)Hex(5)HexNAc(4)Sulf(1) (N), dHex(1)Hex(5)HexNAc(4)Sulf(2) (N), dHex(1)Hex(5)HexNAc(5) (N), dHex(1)Hex(6) (S), dHex(1)Hex(6) (T), dHex(1)Hex(6)HexNAc(2) (N), dHex(1)Hex(6)HexNAc(3) (N), dHex(1)Hex(6)HexNAc(3)Sulf(1) (N), dHex(1)Hex(6)HexNAc(4) (N), dHex(1)Hex(7)HexNAc(2) (N), dHex(1)Hex(7)HexNAc(3) (N), dHex(1)Hex(7)HexNAc(3)Phos(1) (N), dHex(1)Hex(7)HexNAc(3)Sulf(1) (N), dHex(1)Hex(7)HexNAc(4) (N), dHex(1)Hex(8)HexNAc(2) (N), dHex(1)HexNAc(3) (S), dHex(1)HexNAc(3) (T), dHex(1)HexNAc(4) (S), dHex(1)HexNAc(4) (T), dHex(1)HexNAc(5) (S), dHex(1)HexNAc(5) (T), dHex(2)Hex(1)HexNAc(1)Kdn(1) (S), dHex(2)Hex(1)HexNAc(1)Kdn(1) (T), dHex(2)Hex(1)HexNAc(2)Kdn(1) (S), dHex(2)Hex(1)HexNAc(2)Kdn(1) (T), dHex(2)Hex(1)HexNAc(2)NeuAc(1) (S), dHex(2)Hex(1)HexNAc(2)NeuAc(1) (T), dHex(2)Hex(1)HexNAc(2)NeuGc(1) (S), dHex(2)Hex(1)HexNAc(2)NeuGc(1) (T), dHex(2)Hex(1)HexNAc(3) (S), dHex(2)Hex(1)HexNAc(3) (T), dHex(2)Hex(1)HexNAc(4)Sulf(1) (S), dHex(2)Hex(1)HexNAc(4)Sulf(1) (T), dHex(2)Hex(2) (S), dHex(2)Hex(2) (T), dHex(2)Hex(2)HexA(1) (S), dHex(2)Hex(2)HexA(1) (T), dHex(2)Hex(2)HexA(1)HexNAc(1) (S), dHex(2)Hex(2)HexA(1)HexNAc(1) (T), dHex(2)Hex(2)HexA(1)HexNAc(2)Sulf(1) (S), dHex(2)Hex(2)HexA(1)HexNAc(2)Sulf(1) (T), dHex(2)Hex(2)HexNAc(1) (S), dHex(2)Hex(2)HexNAc(1) (T), dHex(2)Hex(2)HexNAc(2) (N), dHex(2)Hex(2)HexNAc(2) (S), dHex(2)Hex(2)HexNAc(2) (T), dHex(2)Hex(2)HexNAc(2)Kdn(1) (S), dHex(2)Hex(2)HexNAc(2)Kdn(1) (T), dHex(2)Hex(2)HexNAc(2)NeuAc(1) (S), dHex(2)Hex(2)HexNAc(2)NeuAc(1) (T), dHex(2)Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (S), dHex(2)Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (T), dHex(2)Hex(2)HexNAc(2)NeuGc(1) (S), dHex(2)Hex(2)HexNAc(2)NeuGc(1) (T), dHex(2)Hex(2)HexNAc(2)Sulf(1) (S), dHex(2)Hex(2)HexNAc(2)Sulf(1) (T), dHex(2)Hex(2)HexNAc(2)Sulf(2) (S), dHex(2)Hex(2)HexNAc(2)Sulf(2) (T), dHex(2)Hex(2)HexNAc(3) (N), dHex(2)Hex(2)HexNAc(3) (S), dHex(2)Hex(2)HexNAc(3) (T), dHex(2)Hex(2)HexNAc(3)NeuAc(1) (S), dHex(2)Hex(2)HexNAc(3)NeuAc(1) (T), dHex(2)Hex(2)HexNAc(3)NeuGc(1) (S), dHex(2)Hex(2)HexNAc(3)NeuGc(1) (T), dHex(2)Hex(2)HexNAc(3)Sulf(1) (S), dHex(2)Hex(2)HexNAc(3)Sulf(1) (T), dHex(2)Hex(2)HexNAc(4) (S), dHex(2)Hex(2)HexNAc(4) (T), dHex(2)Hex(2)HexNAc(4)Sulf(2) (S), dHex(2)Hex(2)HexNAc(4)Sulf(2) (T), dHex(2)Hex(2)HexNAc(5) (S), dHex(2)Hex(2)HexNAc(5) (T), dHex(2)Hex(2)HexNAc(6)Sulf(1) (S), dHex(2)Hex(2)HexNAc(6)Sulf(1) (T), dHex(2)Hex(3) (S), dHex(2)Hex(3) (T), dHex(2)Hex(3)HexA(1)HexNAc(1)Sulf(1) (S), dHex(2)Hex(3)HexA(1)HexNAc(1)Sulf(1) (T), dHex(2)Hex(3)HexA(1)HexNAc(2)Sulf(1) (S), dHex(2)Hex(3)HexA(1)HexNAc(2)Sulf(1) (T), dHex(2)Hex(3)HexA(1)HexNAc(3)Sulf(1) (S), dHex(2)Hex(3)HexA(1)HexNAc(3)Sulf(1) (T), dHex(2)Hex(3)HexNAc(1)Sulf(1) (S), dHex(2)Hex(3)HexNAc(1)Sulf(1) (T), dHex(2)Hex(3)HexNAc(2) (N), dHex(2)Hex(3)HexNAc(2) (S), dHex(2)Hex(3)HexNAc(2) (T), dHex(2)Hex(3)HexNAc(2)NeuGc(1) (S), dHex(2)Hex(3)HexNAc(2)NeuGc(1) (T), dHex(2)Hex(3)HexNAc(2)Sulf(1) (S), dHex(2)Hex(3)HexNAc(2)Sulf(1) (T), dHex(2)Hex(3)HexNAc(3) (N), dHex(2)Hex(3)HexNAc(3) (S), dHex(2)Hex(3)HexNAc(3) (T), dHex(2)Hex(3)HexNAc(3)NeuAc(1) (S), dHex(2)Hex(3)HexNAc(3)NeuAc(1) (T), dHex(2)Hex(3)HexNAc(3)NeuAc(2) (S), dHex(2)Hex(3)HexNAc(3)NeuAc(2) (T), dHex(2)Hex(3)HexNAc(3)Pent(1) (N), dHex(2)Hex(3)HexNAc(3)Pent(2) (N), dHex(2)Hex(3)HexNAc(3)Sulf(1) (S), dHex(2)Hex(3)HexNAc(3)Sulf(1) (T), dHex(2)Hex(3)HexNAc(4) (N), dHex(2)Hex(3)HexNAc(4) (S), dHex(2)Hex(3)HexNAc(4) (T), dHex(2)Hex(3)HexNAc(4)NeuAc(1) (N), dHex(2)Hex(3)HexNAc(4)Pent(1) (N), dHex(2)Hex(3)HexNAc(4)Pent(2) (N), dHex(2)Hex(3)HexNAc(5) (N), dHex(2)Hex(3)HexNAc(5) (S), dHex(2)Hex(3)HexNAc(5) (T), dHex(2)Hex(3)HexNAc(6) (N), dHex(2)Hex(4) (S), dHex(2)Hex(4) (T), dHex(2)Hex(4)HexA(1)HexNAc(3)Sulf(1) (S), dHex(2)Hex(4)HexA(1)HexNAc(3)Sulf(1) (T), dHex(2)Hex(4)HexNAc(1) (S), dHex(2)Hex(4)HexNAc(1) (T), dHex(2)Hex(4)HexNAc(2) (N), dHex(2)Hex(4)HexNAc(2) (S), dHex(2)Hex(4)HexNAc(2) (T), dHex(2)Hex(4)HexNAc(3) (N), dHex(2)Hex(4)HexNAc(3)NeuAc(1)Sulf(1) (N), dHex(2)Hex(4)HexNAc(3)Pent(1) (N), dHex(2)Hex(4)HexNAc(4) (N), dHex(2)Hex(4)HexNAc(4) (S), dHex(2)Hex(4)HexNAc(4) (T), dHex(2)Hex(4)HexNAc(4)Pent(1) (N), dHex(2)Hex(4)HexNAc(4)Sulf(1) (N), dHex(2)Hex(4)HexNAc(5) (N), dHex(2)Hex(4)HexNAc(5) (S), dHex(2)Hex(4)HexNAc(5) (T), dHex(2)Hex(5)HexNAc(2)Me(1) (S), dHex(2)Hex(5)HexNAc(2)Me(1) (T), dHex(2)Hex(5)HexNAc(3)Pent(1) (N), dHex(2)Hex(5)HexNAc(4) (N), dHex(2)HexNAc(2)Kdn(1) (S), dHex(2)HexNAc(2)Kdn(1) (T), dHex(2)HexNAc(5) (S), dHex(2)HexNAc(5) (T), dHex(2)HexNAc(7) (S), dHex(2)HexNAc(7) (T), dHex(3)Hex(1)HexNAc(2)Kdn(1) (S), dHex(3)Hex(1)HexNAc(2)Kdn(1) (T), dHex(3)Hex(1)HexNAc(3)Kdn(1) (S), dHex(3)Hex(1)HexNAc(3)Kdn(1) (T), dHex(3)Hex(2)HexA(1)HexNAc(2)Sulf(1) (S), dHex(3)Hex(2)HexA(1)HexNAc(2)Sulf(1) (T), dHex(3)Hex(2)HexNAc(2) (S), dHex(3)Hex(2)HexNAc(2) (T), dHex(3)Hex(2)HexNAc(2)Kdn(1) (S), dHex(3)Hex(2)HexNAc(2)Kdn(1) (T), dHex(3)Hex(2)HexNAc(3) (S), dHex(3)Hex(2)HexNAc(3) (T), dHex(3)Hex(2)HexNAc(3)Kdn(1) (S), dHex(3)Hex(2)HexNAc(3)Kdn(1) (T), dHex(3)Hex(2)HexNAc(4) (S), dHex(3)Hex(2)HexNAc(4) (T), dHex(3)Hex(2)HexNAc(4)Sulf(2) (S), dHex(3)Hex(2)HexNAc(4)Sulf(2) (T), dHex(3)Hex(3)HexNAc(1) (S), dHex(3)Hex(3)HexNAc(1) (T), dHex(3)Hex(3)HexNAc(2) (S), dHex(3)Hex(3)HexNAc(2) (T), dHex(3)Hex(3)HexNAc(3) (S), dHex(3)Hex(3)HexNAc(3) (T), dHex(3)Hex(3)HexNAc(3)NeuAc(1) (S), dHex(3)Hex(3)HexNAc(3)NeuAc(1) (T), dHex(3)Hex(3)HexNAc(3)Pent(1) (N), dHex(3)Hex(3)HexNAc(4) (N), dHex(3)Hex(3)HexNAc(4)Pent(1) (N), dHex(3)Hex(4)HexNAc(4) (N), dHex(3)Hex(4)HexNAc(4) (S), dHex(3)Hex(4)HexNAc(4) (T), dHex(3)Hex(4)HexNAc(4)Sulf(1) (N), dHex(3)HexNAc(3)Kdn(1) (S), dHex(3)HexNAc(3)Kdn(1) (T), dHex(4)Hex(1)HexNAc(1)Kdn(2) (S), dHex(4)Hex(1)HexNAc(1)Kdn(2) (T), dHex(4)Hex(1)HexNAc(2)Kdn(1) (S), dHex(4)Hex(1)HexNAc(2)Kdn(1) (T), dHex(4)Hex(1)HexNAc(3)Kdn(1) (S), dHex(4)Hex(1)HexNAc(3)Kdn(1) (T), dHex(4)Hex(2)HexNAc(2)Kdn(1) (S), dHex(4)Hex(2)HexNAc(2)Kdn(1) (T), dHex(4)Hex(2)HexNAc(3) (S), dHex(4)Hex(2)HexNAc(3) (T), dHex(4)Hex(3)HexNAc(2)NeuAc(1) (S), dHex(4)Hex(3)HexNAc(2)NeuAc(1) (T), dHex(4)Hex(3)HexNAc(3) (S), dHex(4)Hex(3)HexNAc(3) (T), dHex(4)HexNAc(3)Kdn(1) (S), dHex(4)HexNAc(3)Kdn(1) (T), DHP (C), Di_L-Gln_Ngamma-propargyl-L-Gln_desthiobiotin (D), Di_L-Gln_Ngamma-propargyl-L-Gln_desthiobiotin (E), Di_L-Glu_Ngamma-propargyl-L-Gln_desthiobiotin (D), Di_L-Glu_Ngamma-propargyl-L-Gln_desthiobiotin (E), Diacylglycerol (C), DiART6plex (K), DiART6plex (N-term), DiART6plex (Protein N-term), DiART6plex (Y), DiART6plex115 (K), DiART6plex115 (N-term), DiART6plex115 (Protein N-term), DiART6plex115 (Y), DiART6plex116/119 (K), DiART6plex116/119 (N-term), DiART6plex116/119 (Protein N-term), DiART6plex116/119 (Y), DiART6plex117 (K), DiART6plex117 (N-term), DiART6plex117 (Protein N-term), DiART6plex117 (Y), DiART6plex118 (K), DiART6plex118 (N-term), DiART6plex118 (Protein N-term), DiART6plex118 (Y), Dibromo (Y), Dicarbamidomethyl (C), Dicarbamidomethyl (H), Dicarbamidomethyl (K), Dicarbamidomethyl (N-term), Dicarbamidomethyl (R), dichlorination (C), dichlorination (Y), Didehydro (C-term K), Didehydro (S), Didehydro (T), Didehydro (Y), Didehydroretinylidene (K), Diethyl (K), Diethyl (N-term), Diethylphosphate (C), Diethylphosphate (H), Diethylphosphate (K), Diethylphosphate (N-term), Diethylphosphate (S), Diethylphosphate (T), Diethylphosphate (Y), Diethylphosphothione (C), Diethylphosphothione (H), Diethylphosphothione (K), Diethylphosphothione (S), Diethylphosphothione (T), Diethylphosphothione (Y), Difuran (Y), Dihydroxyimidazolidine (R), Diiodo (H), Diiodo (Y), Diironsubcluster (C), Diisopropylphosphate (K), Diisopropylphosphate (N-term), Diisopropylphosphate (S), Diisopropylphosphate (T), Diisopropylphosphate (Y), DiLeu4plex (K), DiLeu4plex (N-term), DiLeu4plex (Y), DiLeu4plex115 (K), DiLeu4plex115 (N-term), DiLeu4plex115 (Y), DiLeu4plex117 (K), DiLeu4plex117 (N-term), DiLeu4plex117 (Y), DiLeu4plex118 (K), DiLeu4plex118 (N-term), DiLeu4plex118 (Y), Dimethyl (K), Dimethyl (N), Dimethyl (N-term), Dimethyl (Protein N-term P), Dimethyl (Protein N-term), Dimethyl (R), Dimethyl:2H(2)13C (K), Dimethyl:2H(2)13C (N), Dimethyl:2H(2)13C (N-term), Dimethyl:2H(2)13C (Protein N-term P), Dimethyl:2H(2)13C (R), Dimethyl:2H(4) (K), Dimethyl:2H(4) (N-term), Dimethyl:2H(4) (Protein N-term), Dimethyl:2H(4) (R), Dimethyl:2H(4)13C(2) (K), Dimethyl:2H(4)13C(2) (N-term), Dimethyl:2H(4)13C(2) (Protein N-term), Dimethyl:2H(4)13C(2) (R), Dimethyl:2H(6) (K), Dimethyl:2H(6) (N-term), Dimethyl:2H(6) (R), Dimethyl:2H(6)13C(2) (K), Dimethyl:2H(6)13C(2) (N-term), Dimethyl:2H(6)13C(2) (Protein N-term), Dimethyl:2H(6)13C(2) (R), DimethylamineGMBS (C), Dimethylaminoethyl (C), DimethylArsino (C), Dimethylphosphothione (C), Dimethylphosphothione (H), Dimethylphosphothione (K), Dimethylphosphothione (S), Dimethylphosphothione (T), Dimethylphosphothione (Y), DimethylpyrroleAdduct (K), Dioxidation (C), Dioxidation (E), Dioxidation (F), Dioxidation (I), Dioxidation (K), Dioxidation (L), Dioxidation (M), Dioxidation (P), Dioxidation (R), Dioxidation (U), Dioxidation (V), Dioxidation (W), Dioxidation (Y), Diphthamide (H), Dipyridyl (C), Dipyrrolylmethanemethyl (C), DMPO (C), DMPO (H), DMPO (Y), DNCB_hapten (C), DNCB_hapten (H), DNCB_hapten (K), DNCB_hapten (Y), dNIC (K), dNIC (N-term), DNPS (C), DNPS (W), DPIA (C), DTT (C), DVFQQQTGG (K), DyLight-maleimide (C), DYn-2 (C), EDEDTIDVFQQQTGG (K), EDT-iodoacetyl-PEO-biotin (S), EDT-iodoacetyl-PEO-biotin (T), EDT-maleimide-PEO-biotin (S), EDT-maleimide-PEO-biotin (T), EEEDVIEVYQEQTGG (K), EGCG1 (C), EGCG2 (C), EHD-diphenylpentanone (C), EHD-diphenylpentanone (M), EQAT (C), EQAT:2H(5) (C), EQIGG (K), ESP (K), ESP (N-term), ESP:2H(10) (K), ESP:2H(10) (N-term), Ethanedithiol (S), Ethanedithiol (T), Ethanolamine (C), Ethanolamine (C-term), Ethanolamine (D), Ethanolamine (E), Ethanolyl (C), Ethanolyl (K), Ethanolyl (R), Ethyl (C-term), Ethyl (D), Ethyl (E), Ethyl (K), Ethyl (N-term), Ethyl (Protein N-term), Ethyl+Deamidated (N), Ethyl+Deamidated (Q), ethylamino (S), ethylamino (T), Ethylphosphate (K), Ethylphosphate (N-term), Ethylphosphate (S), Ethylphosphate (T), Ethylphosphate (Y), ethylsulfonylethyl (C), ethylsulfonylethyl (H), ethylsulfonylethyl (K), Ethynyl (C), ExacTagAmine (K), ExacTagThiol (C), FAD (C), FAD (H), FAD (Y), Farnesyl (C), Fluorescein (C), Fluorescein-tyramine (Y), Fluoro (A), Fluoro (F), Fluoro (W), Fluoro (Y), FMN (S), FMN (T), FMNC (C), FMNH (C), FMNH (H), FNEM (C), Formyl (K), Formyl (N-term), Formyl (Protein N-term), Formyl (S), Formyl (T), Formylasparagine (H), FormylMet (Protein N-term), FP-Biotin (K), FP-Biotin (S), FP-Biotin (T), FP-Biotin (Y), FTC (C), FTC (K), FTC (P), FTC (R), FTC (S), Furan (Y), G-H1 (R), Galactosyl (K), Galactosyl (N-term), GEE (Q), GeranylGeranyl (C), GG (C), GG (K), GG (Protein N-term), GG (S), GG (T), GGQ (K), GIST-Quat (K), GIST-Quat (N-term), GIST-Quat:2H(3) (K), GIST-Quat:2H(3) (N-term), GIST-Quat:2H(6) (K), GIST-Quat:2H(6) (N-term), GIST-Quat:2H(9) (K), GIST-Quat:2H(9) (N-term), Gln->Ala (Q), Gln->Arg (Q), Gln->Asn (Q), Gln->Asp (Q), Gln->Cys (Q), Gln->Glu (Q), Gln->Gly (Q), Gln->His (Q), Gln->Lys (Q), Gln->Met (Q), Gln->Phe (Q), Gln->Pro (Q), Gln->pyro-Glu (N-term Q), Gln->Ser (Q), Gln->Thr (Q), Gln->Trp (Q), Gln->Tyr (Q), Gln->Val (Q), Gln->Xle (Q), Glu (E), Glu (Protein C-term), Glu+O(2) (H), Glu->Ala (E), Glu->Arg (E), Glu->Asn (E), Glu->Asp (E), Glu->Cys (E), Glu->Gln (E), Glu->Gly (E), Glu->His (E), Glu->Lys (E), Glu->Met (E), Glu->Phe (E), Glu->Pro (E), Glu->pyro-Glu (N-term E), Glu->pyro-Glu+Methyl (N-term E), Glu->pyro-Glu+Methyl:2H(2)13C(1) (N-term E), Glu->Ser (E), Glu->Thr (E), Glu->Trp (E), Glu->Tyr (E), Glu->Val (E), Glu->Xle (E), glucosone (R), Glucosylgalactosyl (K), Glucuronyl (Protein N-term), Glucuronyl (S), Glucuronyl (T), GluGlu (E), GluGlu (Protein C-term), GluGluGlu (E), GluGluGlu (Protein C-term), GluGluGluGlu (E), GluGluGluGlu (Protein C-term), Gluratylation (K), Glutathione (C), Gly (K), Gly (S), Gly (T), Gly+O(2) (H), Gly->Ala (G), Gly->Arg (G), Gly->Asn (G), Gly->Asp (G), Gly->Cys (G), Gly->Gln (G), Gly->Glu (G), Gly->His (G), Gly->Lys (G), Gly->Met (G), Gly->Phe (G), Gly->Pro (G), Gly->Ser (G), Gly->Thr (G), Gly->Trp (G), Gly->Tyr (G), Gly->Val (G), Gly->Xle (G), Gly-loss+Amide (C-term G), Glycerophospho (S), Glyceroyl (K), Glyceroyl (Protein N-term), GlycerylPE (E), glycidamide (K), glycidamide (N-term), Glycosyl (P), glyoxalAGE (R), Glyoxylyl (K), GNLLFLACYCIGG (K), GPIanchor (Protein C-term), Guanidinyl (K), Guanidinyl (N-term), Haloxon (C), Haloxon (H), Haloxon (K), Haloxon (S), Haloxon (T), Haloxon (Y), HCysteinyl (C), HCysThiolactone (K), Heme (C), Heme (H), Hep (K), Hep (N), Hep (Q), Hep (R), Hep (S), Hep (T), Hex (C), Hex (K), Hex (N), Hex (N-term), Hex (R), Hex (S), Hex (T), Hex (W), Hex (Y), Hex(1)HexA(1) (S), Hex(1)HexA(1) (T), Hex(1)HexA(1)HexNAc(1) (S), Hex(1)HexA(1)HexNAc(1) (T), Hex(1)HexA(1)HexNAc(2) (S), Hex(1)HexA(1)HexNAc(2) (T), Hex(1)HexNAc(1) (N), Hex(1)HexNAc(1) (S), Hex(1)HexNAc(1) (T), Hex(1)HexNAc(1)dHex(1) (N), Hex(1)HexNAc(1)dHex(1) (S), Hex(1)HexNAc(1)dHex(1) (T), Hex(1)HexNAc(1)dHex(1)Me(1) (S), Hex(1)HexNAc(1)dHex(1)Me(1) (T), Hex(1)HexNAc(1)dHex(1)Me(2) (S), Hex(1)HexNAc(1)dHex(1)Me(2) (T), Hex(1)HexNAc(1)Kdn(1)Sulf(1) (S), Hex(1)HexNAc(1)Kdn(1)Sulf(1) (T), Hex(1)HexNAc(1)NeuAc(1) (N), Hex(1)HexNAc(1)NeuAc(1) (S), Hex(1)HexNAc(1)NeuAc(1) (T), Hex(1)HexNAc(1)NeuAc(1)Ac(1) (S), Hex(1)HexNAc(1)NeuAc(1)Ac(1) (T), Hex(1)HexNAc(1)NeuAc(1)NeuGc(1) (S), Hex(1)HexNAc(1)NeuAc(1)NeuGc(1) (T), Hex(1)HexNAc(1)NeuAc(1)Sulf(1) (S), Hex(1)HexNAc(1)NeuAc(1)Sulf(1) (T), Hex(1)HexNAc(1)NeuAc(2) (N), Hex(1)HexNAc(1)NeuAc(2) (S), Hex(1)HexNAc(1)NeuAc(2) (T), Hex(1)HexNAc(1)NeuAc(2)Ac(1) (S), Hex(1)HexNAc(1)NeuAc(2)Ac(1) (T), Hex(1)HexNAc(1)NeuAc(2)Ac(2) (S), Hex(1)HexNAc(1)NeuAc(2)Ac(2) (T), Hex(1)HexNAc(1)NeuAc(3) (S), Hex(1)HexNAc(1)NeuAc(3) (T), Hex(1)HexNAc(1)NeuGc(1) (S), Hex(1)HexNAc(1)NeuGc(1) (T), Hex(1)HexNAc(1)NeuGc(2) (S), Hex(1)HexNAc(1)NeuGc(2) (T), Hex(1)HexNAc(1)NeuGc(3) (S), Hex(1)HexNAc(1)NeuGc(3) (T), Hex(1)HexNAc(1)NeuGc(4) (S), Hex(1)HexNAc(1)NeuGc(4) (T), Hex(1)HexNAc(1)NeuGc(5) (S), Hex(1)HexNAc(1)NeuGc(5) (T), Hex(1)HexNAc(1)Phos(1) (S), Hex(1)HexNAc(1)Phos(1) (T), Hex(1)HexNAc(1)Sulf(1) (S), Hex(1)HexNAc(1)Sulf(1) (T), Hex(1)HexNAc(2) (N), Hex(1)HexNAc(2) (S), Hex(1)HexNAc(2) (T), Hex(1)HexNAc(2)dHex(1) (N), Hex(1)HexNAc(2)dHex(1) (S), Hex(1)HexNAc(2)dHex(1) (T), Hex(1)HexNAc(2)dHex(1)Pent(1) (N), Hex(1)HexNAc(2)dHex(2) (N), Hex(1)HexNAc(2)dHex(2) (S), Hex(1)HexNAc(2)dHex(2) (T), Hex(1)HexNAc(2)dHex(2)Sulf(1) (S), Hex(1)HexNAc(2)dHex(2)Sulf(1) (T), Hex(1)HexNAc(2)NeuAc(1) (S), Hex(1)HexNAc(2)NeuAc(1) (T), Hex(1)HexNAc(2)NeuAc(1)Sulf(1) (S), Hex(1)HexNAc(2)NeuAc(1)Sulf(1) (T), Hex(1)HexNAc(2)NeuAc(2) (S), Hex(1)HexNAc(2)NeuAc(2) (T), Hex(1)HexNAc(2)NeuAc(2)Sulf(1) (S), Hex(1)HexNAc(2)NeuAc(2)Sulf(1) (T), Hex(1)HexNAc(2)NeuGc(1) (S), Hex(1)HexNAc(2)NeuGc(1) (T), Hex(1)HexNAc(2)Pent(1) (N), Hex(1)HexNAc(2)Sulf(1) (S), Hex(1)HexNAc(2)Sulf(1) (T), Hex(1)HexNAc(3) (S), Hex(1)HexNAc(3) (T), Hex(1)HexNAc(3)NeuAc(1) (S), Hex(1)HexNAc(3)NeuAc(1) (T), Hex(1)HexNAc(3)NeuAc(2) (S), Hex(1)HexNAc(3)NeuAc(2) (T), Hex(1)HexNAc(3)NeuGc(1) (S), Hex(1)HexNAc(3)NeuGc(1) (T), Hex(1)HexNAc(3)Sulf(1) (S), Hex(1)HexNAc(3)Sulf(1) (T), Hex(1)HexNAc(4)dHex(1)Sulf(1) (S), Hex(1)HexNAc(4)dHex(1)Sulf(1) (T), Hex(1)NeuAc(1) (S), Hex(1)NeuAc(1) (T), Hex(1)NeuAc(1)Pent(1) (S), Hex(1)NeuAc(1)Pent(1) (T), Hex(1)NeuGc(1) (S), Hex(1)NeuGc(1) (T), Hex(1)Pent(1) (S), Hex(1)Pent(1) (T), Hex(1)Pent(2) (S), Hex(1)Pent(2) (T), Hex(1)Pent(2)Me(1) (S), Hex(1)Pent(2)Me(1) (T), Hex(1)Pent(3) (S), Hex(1)Pent(3) (T), Hex(1)Pent(3)Me(1) (S), Hex(1)Pent(3)Me(1) (T), Hex(10)HexNAc(1) (N), Hex(10)Phos(3) (S), Hex(10)Phos(3) (T), Hex(2) (K), Hex(2) (R), Hex(2) (S), Hex(2) (T), Hex(2)HexA(1)HexNAc(1)Sulf(1) (S), Hex(2)HexA(1)HexNAc(1)Sulf(1) (T), Hex(2)HexA(1)NeuAc(1)Pent(1)Sulf(1) (S), Hex(2)HexA(1)NeuAc(1)Pent(1)Sulf(1) (T), Hex(2)HexA(1)Pent(1)Sulf(1) (S), Hex(2)HexA(1)Pent(1)Sulf(1) (T), Hex(2)HexNAc(1) (N), Hex(2)HexNAc(1) (S), Hex(2)HexNAc(1) (T), Hex(2)HexNAc(1)Me(1) (S), Hex(2)HexNAc(1)Me(1) (T), Hex(2)HexNAc(1)NeuGc(1) (S), Hex(2)HexNAc(1)NeuGc(1) (T), Hex(2)HexNAc(1)NeuGc(2) (S), Hex(2)HexNAc(1)NeuGc(2) (T), Hex(2)HexNAc(1)NeuGc(3) (S), Hex(2)HexNAc(1)NeuGc(3) (T), Hex(2)HexNAc(1)NeuGc(4) (S), Hex(2)HexNAc(1)NeuGc(4) (T), Hex(2)HexNAc(1)Pent(1)HexA(1) (S), Hex(2)HexNAc(1)Pent(1)HexA(1) (T), Hex(2)HexNAc(1)Sulf(1) (S), Hex(2)HexNAc(1)Sulf(1) (T), Hex(2)HexNAc(2) (N), Hex(2)HexNAc(2) (S), Hex(2)HexNAc(2) (T), Hex(2)HexNAc(2)dHex(1) (N), Hex(2)HexNAc(2)dHex(1) (S), Hex(2)HexNAc(2)dHex(1) (T), Hex(2)HexNAc(2)NeuAc(1) (N), Hex(2)HexNAc(2)NeuAc(1) (S), Hex(2)HexNAc(2)NeuAc(1) (T), Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (S), Hex(2)HexNAc(2)NeuAc(1)Sulf(1) (T), Hex(2)HexNAc(2)NeuAc(2) (S), Hex(2)HexNAc(2)NeuAc(2) (T), Hex(2)HexNAc(2)NeuAc(2)Sulf(1) (S), Hex(2)HexNAc(2)NeuAc(2)Sulf(1) (T), Hex(2)HexNAc(2)NeuGc(1) (S), Hex(2)HexNAc(2)NeuGc(1) (T), Hex(2)HexNAc(2)Pent(1) (N), Hex(2)HexNAc(2)Sulf(1) (S), Hex(2)HexNAc(2)Sulf(1) (T), Hex(2)HexNAc(3) (N), Hex(2)HexNAc(3) (S), Hex(2)HexNAc(3) (T), Hex(2)HexNAc(3)NeuAc(1)NeuGc(1) (S), Hex(2)HexNAc(3)NeuAc(1)NeuGc(1) (T), Hex(2)HexNAc(3)NeuAc(1)Sulf(1) (S), Hex(2)HexNAc(3)NeuAc(1)Sulf(1) (T), Hex(2)HexNAc(3)NeuAc(2) (S), Hex(2)HexNAc(3)NeuAc(2) (T), Hex(2)HexNAc(3)NeuAc(3) (S), Hex(2)HexNAc(3)NeuAc(3) (T), Hex(2)HexNAc(3)NeuGc(1) (S), Hex(2)HexNAc(3)NeuGc(1) (T), Hex(2)HexNAc(3)NeuGc(2) (S), Hex(2)HexNAc(3)NeuGc(2) (T), Hex(2)HexNAc(3)NeuGc(3) (S), Hex(2)HexNAc(3)NeuGc(3) (T), Hex(2)HexNAc(3)Sulf(1) (S), Hex(2)HexNAc(3)Sulf(1) (T), Hex(2)HexNAc(4) (N), Hex(2)HexNAc(4) (S), Hex(2)HexNAc(4) (T), Hex(2)HexNAc(4)NeuAc(1) (S), Hex(2)HexNAc(4)NeuAc(1) (T), Hex(2)HexNAc(5) (S), Hex(2)HexNAc(5) (T), Hex(2)NeuAc(1) (S), Hex(2)NeuAc(1) (T), Hex(2)Pent(2) (S), Hex(2)Pent(2) (T), Hex(2)Pent(2)Me(1) (S), Hex(2)Pent(2)Me(1) (T), Hex(2)Sulf(1) (S), Hex(2)Sulf(1) (T), Hex(3) (N), Hex(3) (S), Hex(3) (T), Hex(3)HexNAc(1) (N), Hex(3)HexNAc(1) (S), Hex(3)HexNAc(1) (T), Hex(3)HexNAc(1)HexA(1) (S), Hex(3)HexNAc(1)HexA(1) (T), Hex(3)HexNAc(1)Me(1) (S), Hex(3)HexNAc(1)Me(1) (T), Hex(3)HexNAc(1)Pent(1) (N), Hex(3)HexNAc(2) (N), Hex(3)HexNAc(2) (S), Hex(3)HexNAc(2) (T), Hex(3)HexNAc(2)NeuAc(1) (N), Hex(3)HexNAc(2)NeuAc(2) (S), Hex(3)HexNAc(2)NeuAc(2) (T), Hex(3)HexNAc(2)Pent(1) (N), Hex(3)HexNAc(2)Phos(1) (N), Hex(3)HexNAc(3) (N), Hex(3)HexNAc(3) (S), Hex(3)HexNAc(3) (T), Hex(3)HexNAc(3)NeuAc(1) (S), Hex(3)HexNAc(3)NeuAc(1) (T), Hex(3)HexNAc(3)NeuAc(1)Sulf(1) (S), Hex(3)HexNAc(3)NeuAc(1)Sulf(1) (T), Hex(3)HexNAc(3)NeuAc(2) (S), Hex(3)HexNAc(3)NeuAc(2) (T), Hex(3)HexNAc(3)NeuAc(2)Sulf(1) (S), Hex(3)HexNAc(3)NeuAc(2)Sulf(1) (T), Hex(3)HexNAc(3)NeuAc(3) (S), Hex(3)HexNAc(3)NeuAc(3) (T), Hex(3)HexNAc(3)NeuGc(1) (S), Hex(3)HexNAc(3)NeuGc(1) (T), Hex(3)HexNAc(3)NeuGc(1)Sulf(1) (S), Hex(3)HexNAc(3)NeuGc(1)Sulf(1) (T), Hex(3)HexNAc(3)Pent(1) (N), Hex(3)HexNAc(3)Sulf(1) (N), Hex(3)HexNAc(3)Sulf(1) (S), Hex(3)HexNAc(3)Sulf(1) (T), Hex(3)HexNAc(4) (N), Hex(3)HexNAc(4) (S), Hex(3)HexNAc(4) (T), Hex(3)HexNAc(4)NeuAc(1) (N), Hex(3)HexNAc(4)NeuAc(2) (N), Hex(3)HexNAc(4)Pent(1) (N), Hex(3)HexNAc(4)Sulf(1) (N), Hex(3)HexNAc(5) (N), Hex(3)HexNAc(5) (S), Hex(3)HexNAc(5) (T), Hex(3)HexNAc(5)NeuAc(1) (N), Hex(3)HexNAc(5)Sulf(1) (N), Hex(3)HexNAc(6) (N), Hex(3)HexNAc(6) (S), Hex(3)HexNAc(6) (T), Hex(3)HexNAc(6)NeuAc(1) (N), Hex(3)HexNAc(6)Sulf(1) (N), Hex(3)HexNAc(6)Sulf(2) (N), Hex(3)HexNAc(7) (N), Hex(3)HexNAc(7)Sulf(1) (N), Hex(4) (S), Hex(4) (T), Hex(4)HexA(1) (S), Hex(4)HexA(1) (T), Hex(4)HexA(1)HexNAc(1) (S), Hex(4)HexA(1)HexNAc(1) (T), Hex(4)HexNAc(1) (N), Hex(4)HexNAc(1) (S), Hex(4)HexNAc(1) (T), Hex(4)HexNAc(2) (N), Hex(4)HexNAc(2)NeuAc(1) (N), Hex(4)HexNAc(2)NeuAc(1) (S), Hex(4)HexNAc(2)NeuAc(1) (T), Hex(4)HexNAc(2)Pent(1) (N), Hex(4)HexNAc(3) (N), Hex(4)HexNAc(3) (S), Hex(4)HexNAc(3) (T), Hex(4)HexNAc(3)NeuAc(1) (N), Hex(4)HexNAc(3)NeuAc(1) (S), Hex(4)HexNAc(3)NeuAc(1) (T), Hex(4)HexNAc(3)NeuAc(2) (N), Hex(4)HexNAc(3)NeuGc(1) (N), Hex(4)HexNAc(3)Pent(1) (N), Hex(4)HexNAc(4) (N), Hex(4)HexNAc(4) (S), Hex(4)HexNAc(4) (T), Hex(4)HexNAc(4)Me(2)Pent(1) (N), Hex(4)HexNAc(4)NeuAc(1) (N), Hex(4)HexNAc(4)NeuAc(1) (S), Hex(4)HexNAc(4)NeuAc(1) (T), Hex(4)HexNAc(4)NeuAc(1)Sulf(2) (S), Hex(4)HexNAc(4)NeuAc(1)Sulf(2) (T), Hex(4)HexNAc(4)NeuAc(1)Sulf(3) (S), Hex(4)HexNAc(4)NeuAc(1)Sulf(3) (T), Hex(4)HexNAc(4)NeuGc(1) (N), Hex(4)HexNAc(4)NeuGc(1) (S), Hex(4)HexNAc(4)NeuGc(1) (T), Hex(4)HexNAc(4)NeuGc(1)Sulf(2) (S), Hex(4)HexNAc(4)NeuGc(1)Sulf(2) (T), Hex(4)HexNAc(4)Pent(1) (N), Hex(4)HexNAc(4)Sulf(1) (N), Hex(4)HexNAc(4)Sulf(2) (S), Hex(4)HexNAc(4)Sulf(2) (T), Hex(4)HexNAc(5) (N), Hex(4)HexNAc(5)NeuAc(1) (N), Hex(4)HexNAc(5)Sulf(1) (N), Hex(4)HexNAc(6) (N), Hex(4)Phos(1) (S), Hex(4)Phos(1) (T), Hex(5) (S), Hex(5) (T), Hex(5)HexA(1) (S), Hex(5)HexA(1) (T), Hex(5)HexNAc(1) (N), Hex(5)HexNAc(1) (S), Hex(5)HexNAc(1) (T), Hex(5)HexNAc(2) (N), Hex(5)HexNAc(2)Phos(1) (N), Hex(5)HexNAc(3) (N), Hex(5)HexNAc(3)Pent(1) (N), Hex(5)HexNAc(4) (N), Hex(5)HexNAc(4) (S), Hex(5)HexNAc(4) (T), Hex(5)HexNAc(4)Me(2)Pent(1) (N), Hex(5)HexNAc(4)NeuAc(1) (N), Hex(5)HexNAc(4)NeuAc(1)Ac(1) (N), Hex(5)HexNAc(4)NeuAc(1)Ac(2) (N), Hex(5)HexNAc(4)NeuAc(1)Sulf(1) (N), Hex(5)HexNAc(4)NeuAc(2) (N), Hex(5)HexNAc(4)NeuGc(1) (N), Hex(5)HexNAc(4)Sulf(1) (N), Hex(5)HexNAc(5) (N), Hex(5)HexNAc(5) (S), Hex(5)HexNAc(5) (T), Hex(5)Phos(1) (S), Hex(5)Phos(1) (T), Hex(5)Phos(3) (S), Hex(5)Phos(3) (T), Hex(6)HexNAc(1) (N), Hex(6)HexNAc(2) (N), Hex(6)HexNAc(2)Phos(1) (N), Hex(6)HexNAc(3) (N), Hex(6)HexNAc(3)Phos(1) (N), Hex(6)HexNAc(4) (N), Hex(6)HexNAc(4) (S), Hex(6)HexNAc(4) (T), Hex(6)HexNAc(4)Me(3) (N), Hex(6)HexNAc(4)Me(3)Pent(1) (N), Hex(6)HexNAc(5) (N), Hex(6)HexNAc(5)NeuAc(3) (N), Hex(6)Phos(1) (S), Hex(6)Phos(1) (T), Hex(6)Phos(3) (S), Hex(6)Phos(3) (T), Hex(7)HexNAc(1) (N), Hex(7)HexNAc(2) (N), Hex(7)HexNAc(2)Phos(1) (N), Hex(7)HexNAc(2)Phos(2) (N), Hex(7)HexNAc(3) (N), Hex(7)HexNAc(3)Phos(1) (N), Hex(7)HexNAc(4) (N), Hex(7)HexNAc(6) (N), Hex(7)HexNAc(6) (S), Hex(7)HexNAc(6) (T), Hex(7)Phos(3) (S), Hex(7)Phos(3) (T), Hex(8)HexNAc(1) (N), Hex(8)HexNAc(2) (N), Hex(8)Phos(3) (S), Hex(8)Phos(3) (T), Hex(9) (N), Hex(9)HexNAc(1) (N), Hex(9)HexNAc(2) (N), Hex(9)Phos(3) (S), Hex(9)Phos(3) (T), HexA(2)HexNAc(3) (S), HexA(2)HexNAc(3) (T), Hexanoyl (K), HexN (K), HexN (N), HexN (S), HexN (T), HexN (W), HexNAc (C), HexNAc (N), HexNAc (S), HexNAc (T), HexNAc(1)dHex(1) (N), HexNAc(1)dHex(1) (S), HexNAc(1)dHex(1) (T), HexNAc(1)dHex(2) (N), HexNAc(1)Kdn(2) (S), HexNAc(1)Kdn(2) (T), HexNAc(1)NeuAc(1) (S), HexNAc(1)NeuAc(1) (T), HexNAc(1)NeuGc(1) (S), HexNAc(1)NeuGc(1) (T), HexNAc(1)NeuGc(2) (S), HexNAc(1)NeuGc(2) (T), HexNAc(2) (N), HexNAc(2) (S), HexNAc(2) (T), HexNAc(2)dHex(1) (N), HexNAc(2)dHex(2) (N), HexNAc(2)NeuAc(1) (S), HexNAc(2)NeuAc(1) (T), HexNAc(2)NeuAc(1)Sulf(1) (S), HexNAc(2)NeuAc(1)Sulf(1) (T), HexNAc(2)NeuGc(1) (S), HexNAc(2)NeuGc(1) (T), HexNAc(2)Sulf(1) (S), HexNAc(2)Sulf(1) (T), HexNAc(3) (S), HexNAc(3) (T), HexNAc(3)Sulf(1) (S), HexNAc(3)Sulf(1) (T), HexNAc(4) (S), HexNAc(4) (T), HexNAc(5) (S), HexNAc(5) (T), His+O(2) (H), His->Ala (H), His->Arg (H), His->Asn (H), His->Asp (H), His->Cys (H), His->Gln (H), His->Glu (H), His->Gly (H), His->Lys (H), His->Met (H), His->Phe (H), His->Pro (H), His->Ser (H), His->Thr (H), His->Trp (H), His->Tyr (H), His->Val (H), His->Xle (H), HMVK (C), HN2_mustard (C), HN2_mustard (H), HN2_mustard (K), HN3_mustard (C), HN3_mustard (H), HN3_mustard (K), HNE (A), HNE (C), HNE (H), HNE (K), HNE (L), HNE (R), HNE+Delta:H(2) (C), HNE+Delta:H(2) (H), HNE+Delta:H(2) (K), HNE-BAHAH (C), HNE-BAHAH (H), HNE-BAHAH (K), HNE-Delta:H(2)O (C), HNE-Delta:H(2)O (H), HNE-Delta:H(2)O (K), Homocysteic_acid (M), HPG (R), Hydroxamic_acid (D), Hydroxamic_acid (E), Hydroxycinnamyl (C), Hydroxyfarnesyl (C), Hydroxyheme (E), hydroxyisobutyryl (K), Hydroxymethyl (N), HydroxymethylOP (K), Hydroxytrimethyl (K), Hypusine (K), IASD (C), IBTP (C), ICAT-C (C), ICAT-C:13C(9) (C), ICAT-D (C), ICAT-D:2H(8) (C), ICAT-G (C), ICAT-G:2H(8) (C), ICAT-H (C), ICAT-H:13C(6) (C), ICDID (C), ICDID:2H(6) (C), ICPL (K), ICPL (N-term), ICPL (Protein N-term), ICPL:13C(6) (K), ICPL:13C(6) (N-term), ICPL:13C(6) (Protein N-term), ICPL:13C(6)2H(4) (K), ICPL:13C(6)2H(4) (N-term), ICPL:13C(6)2H(4) (Protein N-term), ICPL:2H(4) (K), ICPL:2H(4) (N-term), ICPL:2H(4) (Protein N-term), IDEnT (C), IED-Biotin (C), IGBP (C), IGBP:13C(2) (C), IMEHex(2)NeuAc(1) (K), IMID (K), IMID:2H(4) (K), Iminobiotin (K), Iminobiotin (N-term), Iodo (H), Iodo (Y), Iodoacetanilide (C), Iodoacetanilide (K), Iodoacetanilide (N-term), Iodoacetanilide:13C(6) (C), Iodoacetanilide:13C(6) (K), Iodoacetanilide:13C(6) (N-term), iodoTMT (C), iodoTMT (D), iodoTMT (E), iodoTMT (H), iodoTMT (K), iodoTMT6plex (C), iodoTMT6plex (D), iodoTMT6plex (E), iodoTMT6plex (H), iodoTMT6plex (K), IodoU-AMP (F), IodoU-AMP (W), IodoU-AMP (Y), ISD_z+2_ion (N-term), Isopropylphospho (S), Isopropylphospho (T), Isopropylphospho (Y), Isovaleryl (K), iST-NHS specific cysteine modification (C), Itaconatyl (C), Itaconyl (K), iTRAQ4plex (C), iTRAQ4plex (H), iTRAQ4plex (K), iTRAQ4plex (N-term), iTRAQ4plex (Protein N-term), iTRAQ4plex (S), iTRAQ4plex (T), iTRAQ4plex (Y), iTRAQ4plex114 (C), iTRAQ4plex114 (K), iTRAQ4plex114 (N-term), iTRAQ4plex114 (Y), iTRAQ4plex115 (C), iTRAQ4plex115 (K), iTRAQ4plex115 (N-term), iTRAQ4plex115 (Y), iTRAQ8plex (C), iTRAQ8plex (H), iTRAQ8plex (K), iTRAQ8plex (N-term), iTRAQ8plex (Protein N-term), iTRAQ8plex (S), iTRAQ8plex (T), iTRAQ8plex (Y), iTRAQ8plex:13C(6)15N(2) (C), iTRAQ8plex:13C(6)15N(2) (K), iTRAQ8plex:13C(6)15N(2) (N-term), iTRAQ8plex:13C(6)15N(2) (Y), L-Gln (D), L-Gln (E), Label:13C(1)2H(3) (M), Label:13C(1)2H(3)+Oxidation (M), Label:13C(2)15N(1) (G), Label:13C(2)15N(2) (K), Label:13C(3) (A), Label:13C(3)15N(1) (A), Label:13C(3)15N(1) (S), Label:13C(4) (M), Label:13C(4)+Oxidation (M), Label:13C(4)15N(1) (D), Label:13C(4)15N(2)+GG (K), Label:13C(5) (P), Label:13C(5)15N(1) (E), Label:13C(5)15N(1) (M), Label:13C(5)15N(1) (P), Label:13C(5)15N(1) (V), Label:13C(6) (I), Label:13C(6) (K), Label:13C(6) (L), Label:13C(6) (R), Label:13C(6)+Acetyl (K), Label:13C(6)+Dimethyl (K), Label:13C(6)+GG (K), Label:13C(6)15N(1) (I), Label:13C(6)15N(1) (L), Label:13C(6)15N(2) (K), Label:13C(6)15N(2)+Acetyl (K), Label:13C(6)15N(2)+Dimethyl (K), Label:13C(6)15N(2)+GG (K), Label:13C(6)15N(2)+TMT6plex (K), Label:13C(6)15N(2)+TMTpro (K), Label:13C(6)15N(4) (R), Label:13C(6)15N(4)+Dimethyl (R), Label:13C(6)15N(4)+Dimethyl:2H(6)13C(2) (R), Label:13C(6)15N(4)+Methyl (R), Label:13C(6)15N(4)+Methyl:2H(3)13C(1) (R), Label:13C(9) (F), Label:13C(9) (Y), Label:13C(9)+Phospho (Y), Label:13C(9)15N(1) (F), Label:15N(1) (A), Label:15N(1) (C), Label:15N(1) (D), Label:15N(1) (E), Label:15N(1) (F), Label:15N(1) (G), Label:15N(1) (I), Label:15N(1) (L), Label:15N(1) (M), Label:15N(1) (P), Label:15N(1) (S), Label:15N(1) (T), Label:15N(1) (V), Label:15N(1) (Y), Label:15N(2) (K), Label:15N(2) (N), Label:15N(2) (Q), Label:15N(2) (W), Label:15N(2)2H(9) (K), Label:15N(3) (H), Label:15N(4) (R), Label:18O(1) (C-term), Label:18O(1) (S), Label:18O(1) (T), Label:18O(1) (Y), Label:18O(2) (C-term), Label:2H(10) (L), Label:2H(3) (L), Label:2H(3) (M), Label:2H(3)+Oxidation (M), Label:2H(4) (A), Label:2H(4) (F), Label:2H(4) (K), Label:2H(4) (U), Label:2H(4) (Y), Label:2H(4)+Acetyl (K), Label:2H(4)+GG (K), Label:2H(4)13C(1) (R), Label:2H(6)15N(1) (P), Label:2H(7)15N(4) (R), Label:2H(9)13C(6)15N(2) (K), Lactylation (K), lapachenole (C), Leu->MetOx (L), LG-anhydrolactam (K), LG-anhydrolactam (N-term), LG-anhyropyrrole (K), LG-anhyropyrrole (N-term), LG-Hlactam-K (K), LG-Hlactam-K (Protein N-term), LG-Hlactam-R (R), LG-lactam-K (K), LG-lactam-K (Protein N-term), LG-lactam-R (R), LG-pyrrole (C), LG-pyrrole (K), LG-pyrrole (N-term), Lipoyl (K), LRGG (K), LRGG+dimethyl (K), LRGG+methyl (K), LTX+Lophotoxin (Y), Lys (N-term), Lys+O(2) (H), Lys->Ala (K), Lys->Allysine (K), Lys->AminoadipicAcid (K), Lys->Arg (K), Lys->Asn (K), Lys->Asp (K), Lys->CamCys (K), Lys->Cys (K), Lys->Gln (K), Lys->Glu (K), Lys->Gly (K), Lys->His (K), Lys->Met (K), Lys->MetOx (K), Lys->Phe (K), Lys->Pro (K), Lys->Ser (K), Lys->Thr (K), Lys->Trp (K), Lys->Tyr (K), Lys->Val (K), Lys->Xle (K), Lys-loss (K), Lys-loss (Protein C-term K), Lysbiotinhydrazide (K), maleimide (C), maleimide (K), Maleimide-PEO2-Biotin (C), maleimide3 (C), maleimide3 (K), maleimide5 (C), maleimide5 (K), Malonyl (C), Malonyl (K), Malonyl (S), MBS+peptide (C), MDCC (C), MeMePhosphorothioate (S), Menadione (C), Menadione (K), Menadione-HQ (C), Menadione-HQ (K), MercaptoEthanol (S), MercaptoEthanol (T), MesitylOxide (H), MesitylOxide (K), MesitylOxide (Protein N-term), Met+O(2) (H), Met->Aha (M), Met->Ala (M), Met->Arg (M), Met->Asn (M), Met->Asp (M), Met->AspSA (M), Met->Cys (M), Met->Gln (M), Met->Glu (M), Met->Gly (M), Met->His (M), Met->Hpg (M), Met->Hse (C-term M), Met->Hsl (C-term M), Met->Lys (M), Met->Phe (M), Met->Pro (M), Met->Ser (M), Met->Thr (M), Met->Trp (M), Met->Tyr (M), Met->Val (M), Met->Xle (M), Met-loss (Protein N-term M), Met-loss+Acetyl (Protein N-term M), Methamidophos-O (C), Methamidophos-O (H), Methamidophos-O (K), Methamidophos-O (S), Methamidophos-O (T), Methamidophos-O (Y), Methamidophos-S (C), Methamidophos-S (H), Methamidophos-S (K), Methamidophos-S (S), Methamidophos-S (T), Methamidophos-S (Y), Methyl (C), Methyl (C-term), Methyl (D), Methyl (E), Methyl (H), Methyl (I), Methyl (K), Methyl (L), Methyl (N), Methyl (N-term), Methyl (Protein N-term), Methyl (Q), Methyl (R), Methyl (S), Methyl (T), Methyl+Acetyl:2H(3) (K), Methyl+Deamidated (N), Methyl+Deamidated (Q), Methyl-PEO12-Maleimide (C), Methyl:2H(2) (K), Methyl:2H(2) (N-term), Methyl:2H(2)13C (C), Methyl:2H(2)13C (C-term), Methyl:2H(2)13C (D), Methyl:2H(2)13C (E), Methyl:2H(2)13C (H), Methyl:2H(2)13C (I), Methyl:2H(2)13C (K), Methyl:2H(2)13C (L), Methyl:2H(2)13C (N), Methyl:2H(2)13C (N-term), Methyl:2H(2)13C (Protein N-term), Methyl:2H(2)13C (Q), Methyl:2H(2)13C (R), Methyl:2H(2)13C (S), Methyl:2H(2)13C (T), Methyl:2H(3) (D), Methyl:2H(3) (E), Methyl:2H(3) (K), Methyl:2H(3) (R), Methyl:2H(3) (X), Methyl:2H(3)+Acetyl:2H(3) (K), Methyl:2H(3)13C(1) (K), Methyl:2H(3)13C(1) (N-term), Methyl:2H(3)13C(1) (R), Methylamine (S), Methylamine (T), Methylmalonylation (S), methylol (K), methylol (W), methylol (Y), Methylphosphonate (S), Methylphosphonate (T), Methylphosphonate (Y), Methylpyrroline (K), methylsulfonylethyl (C), methylsulfonylethyl (H), methylsulfonylethyl (K), Methylthio (C), Methylthio (D), Methylthio (K), Methylthio (N), Methylthio (N-term), MG-H1 (R), Microcin (Protein C-term), MicrocinC7 (Protein C-term), MM-diphenylpentanone (C), Molybdopterin (C), MolybdopterinGD (C), MolybdopterinGD (D), MolybdopterinGD (U), MolybdopterinGD+Delta:S(-1)Se(1) (C), Mono_Ngamma-propargyl-L-Gln_desthiobiotin (C), monomethylphosphothione (C), monomethylphosphothione (H), monomethylphosphothione (K), monomethylphosphothione (S), monomethylphosphothione (T), monomethylphosphothione (Y), mTRAQ (H), mTRAQ (K), mTRAQ (N-term), mTRAQ (S), mTRAQ (T), mTRAQ (Y), mTRAQ:13C(3)15N(1) (H), mTRAQ:13C(3)15N(1) (K), mTRAQ:13C(3)15N(1) (N-term), mTRAQ:13C(3)15N(1) (S), mTRAQ:13C(3)15N(1) (T), mTRAQ:13C(3)15N(1) (Y), mTRAQ:13C(6)15N(2) (H), mTRAQ:13C(6)15N(2) (K), mTRAQ:13C(6)15N(2) (N-term), mTRAQ:13C(6)15N(2) (S), mTRAQ:13C(6)15N(2) (T), mTRAQ:13C(6)15N(2) (Y), MTSL (C), MurNAc (A), Myristoleyl (Protein N-term G), Myristoyl (C), Myristoyl (K), Myristoyl (N-term G), Myristoyl+Delta:H(-4) (Protein N-term G), N-dimethylphosphate (S), N6pAMP (S), N6pAMP (T), N6pAMP (Y), NA-LNO2 (C), NA-LNO2 (H), NA-OA-NO2 (C), NA-OA-NO2 (H), NBF (C), NBF (K), NBF (R), NBS (W), NBS:13C(6) (W), NDA (K), NDA (N-term), NEIAA (C), NEIAA (Y), NEIAA:2H(5) (C), NEIAA:2H(5) (Y), NEM:2H(5) (C), NEM:2H(5)+H2O (C), NEMsulfur (C), NEMsulfurWater (C), Nethylmaleimide (C), Nethylmaleimide+water (C), Nethylmaleimide+water (K), NeuAc (N), NeuAc (S), NeuAc (T), NeuGc (N), NeuGc (S), NeuGc (T), NHS-fluorescein (K), NHS-LC-Biotin (K), NHS-LC-Biotin (N-term), NIC (K), NIC (N-term), NIPCAM (C), Nitrene (Y), Nitro (F), Nitro (W), Nitro (Y), Nitrosyl (C), Nitrosyl (Y), Nmethylmaleimide (C), Nmethylmaleimide (K), Nmethylmaleimide+water (C), NO_SMX_SEMD (C), NO_SMX_SIMD (C), NP40 (N-term), NQIGG (K), NQTGG (K), O-Dimethylphosphate (S), O-Dimethylphosphate (T), O-Dimethylphosphate (Y), O-Et-N-diMePhospho (S), O-Isopropylmethylphosphonate (S), O-Isopropylmethylphosphonate (T), O-Isopropylmethylphosphonate (Y), O-Methylphosphate (S), O-Methylphosphate (T), O-Methylphosphate (Y), O-pinacolylmethylphosphonate (H), O-pinacolylmethylphosphonate (K), O-pinacolylmethylphosphonate (S), O-pinacolylmethylphosphonate (T), O-pinacolylmethylphosphonate (Y), Octanoyl (C), Octanoyl (S), Octanoyl (T), OxArgBiotin (R), OxArgBiotinRed (R), Oxidation (C), Oxidation (C-term G), Oxidation (D), Oxidation (E), Oxidation (F), Oxidation (H), Oxidation (I), Oxidation (K), Oxidation (L), Oxidation (M), Oxidation (N), Oxidation (P), Oxidation (Q), Oxidation (R), Oxidation (S), Oxidation (T), Oxidation (U), Oxidation (V), Oxidation (W), Oxidation (Y), Oxidation+NEM (C), OxLysBiotin (K), OxLysBiotinRed (K), OxProBiotin (P), OxProBiotinRed (P), Palmitoleyl (C), Palmitoleyl (S), Palmitoleyl (T), Palmitoyl (C), Palmitoyl (K), Palmitoyl (Protein N-term), Palmitoyl (S), Palmitoyl (T), PEITC (C), PEITC (K), PEITC (N-term), Pent(1)HexNAc(1) (S), Pent(1)HexNAc(1) (T), Pent(2) (S), Pent(2) (T), Pentanoyl (K), Pentose (S), Pentose (T), Pentylamine (Q), PEO-Iodoacetyl-LC-Biotin (C), PET (S), PET (T), Phe->Ala (F), Phe->Arg (F), Phe->Asn (F), Phe->Asp (F), Phe->CamCys (F), Phe->Cys (F), Phe->Gln (F), Phe->Glu (F), Phe->Gly (F), Phe->His (F), Phe->Lys (F), Phe->Met (F), Phe->Pro (F), Phe->Ser (F), Phe->Thr (F), Phe->Trp (F), Phe->Tyr (F), Phe->Val (F), Phe->Xle (F), phenyl-phosphate (K), phenyl-phosphate (S), phenyl-phosphate (T), phenyl-phosphate (Y), Phenylisocyanate (N-term), Phenylisocyanate:2H(5) (N-term), phenylsulfonylethyl (C), Phospho (C), Phospho (D), Phospho (E), Phospho (H), Phospho (K), Phospho (R), Phospho (S), Phospho (T), Phospho (Y), Phosphoadenosine (H), Phosphoadenosine (K), Phosphoadenosine (S), Phosphoadenosine (T), Phosphoadenosine (Y), PhosphoCytidine (S), PhosphoCytidine (T), PhosphoCytidine (Y), PhosphoDecoy (A), PhosphoDecoy (G), PhosphoDecoy (L), Phosphogluconoylation (K), Phosphogluconoylation (N-term), Phosphoguanosine (H), Phosphoguanosine (K), PhosphoHex (S), PhosphoHex (T), PhosphoHex(2) (N), PhosphoHex(2) (S), PhosphoHex(2) (T), PhosphoHexNAc (S), PhosphoHexNAc (T), Phosphopantetheine (S), Phosphopropargyl (S), Phosphopropargyl (T), Phosphopropargyl (Y), phosphoRibosyl (D), phosphoRibosyl (E), phosphoRibosyl (R), PhosphoribosyldephosphoCoA (S), PhosphoUridine (H), PhosphoUridine (Y), Phycocyanobilin (C), Phycoerythrobilin (C), Phytochromobilin (C), Piperidine (K), Piperidine (N-term), pRBS-ID_4-thiouridine (F), pRBS-ID_6-thioguanosine (W), Pro+O(2) (H), Pro->Ala (P), Pro->Arg (P), Pro->Asn (P), Pro->Asp (P), Pro->Cys (P), Pro->Gln (P), Pro->Glu (P), Pro->Gly (P), Pro->HAVA (P), Pro->His (P), Pro->Lys (P), Pro->Met (P), Pro->Phe (P), Pro->pyro-Glu (P), Pro->Pyrrolidinone (P), Pro->Pyrrolidone (P), Pro->Ser (P), Pro->Thr (P), Pro->Trp (P), Pro->Tyr (P), Pro->Val (P), Pro->Xle (P), probiotinhydrazide (P), Propargylamine (C-term), Propargylamine (D), Propargylamine (E), Propionamide (C), Propionamide (K), Propionamide (N-term), Propionamide:2H(3) (C), Propionyl (K), Propionyl (N-term), Propionyl (Protein N-term), Propionyl (S), Propionyl (T), Propionyl:13C(3) (K), Propionyl:13C(3) (N-term), Propiophenone (C), Propiophenone (H), Propiophenone (K), Propiophenone (R), Propiophenone (S), Propiophenone (T), Propiophenone (W), Propyl (C-term), Propyl (D), Propyl (E), Propyl (K), Propyl (N-term), Propyl (Protein C-term), Propyl:2H(6) (K), Propyl:2H(6) (N-term), PropylNAGthiazoline (C), PS_Hapten (C), PS_Hapten (H), PS_Hapten (K), pupylation (K), Puromycin (C-term), PyMIC (N-term), PyridoxalPhosphate (K), PyridoxalPhosphateH2 (K), Pyridylacetyl (K), Pyridylacetyl (N-term), Pyridylethyl (C), Pyro-carbamidomethyl (N-term C), Pyro-QQTGG (K), pyrophospho (S), pyrophospho (T), PyruvicAcidIminyl (K), PyruvicAcidIminyl (Protein N-term C), PyruvicAcidIminyl (Protein N-term V), Pyruvoyl (K), QAT (C), QAT:2H(3) (C), QEQTGG (K), QQQTGG (K), QQTGG (K), QTGG (K), Quinone (W), Quinone (Y), RBS-ID_Uridine (Y), Retinylidene (K), RNPXL (N-term K), RNPXL (N-term R), RNPXlink1 (C), s-GlcNAc (S), s-GlcNAc (T), Saligenin (H), Saligenin (K), Ser->Ala (S), Ser->Arg (S), Ser->Asn (S), Ser->Asp (S), Ser->Cys (S), Ser->Gln (S), Ser->Glu (S), Ser->Gly (S), Ser->His (S), Ser->LacticAcid (Protein N-term S), Ser->Lys (S), Ser->Met (S), Ser->Phe (S), Ser->Pro (S), Ser->Thr (S), Ser->Trp (S), Ser->Tyr (S), Ser->Val (S), Ser->Xle (S), Ser/Thr-KDO (S), Ser/Thr-KDO (T), serotonylation (Q), shTMT (K), shTMT (N-term), shTMT (Protein N-term), shTMTpro (K), shTMTpro (N-term), shTMTpro (Protein N-term), SMA (K), SMA (N-term), spermidine (Q), spermine (Q), SPITC (K), SPITC (N-term), SPITC:13C(6) (K), SPITC:13C(6) (N-term), Succinyl (K), Succinyl (N-term), Succinyl (Protein N-term), Succinyl:13C(4) (K), Succinyl:13C(4) (N-term), Succinyl:2H(4) (K), Succinyl:2H(4) (N-term), SulfanilicAcid (C-term), SulfanilicAcid (D), SulfanilicAcid (E), SulfanilicAcid:13C(6) (C-term), SulfanilicAcid:13C(6) (D), SulfanilicAcid:13C(6) (E), Sulfide (C), Sulfide (D), Sulfide (W), Sulfo (C), Sulfo (S), Sulfo (T), Sulfo (Y), sulfo+amino (Y), Sulfo-NHS-LC-LC-Biotin (K), Sulfo-NHS-LC-LC-Biotin (N-term), SulfoGMBS (C), SulfurDioxide (C), SUMO2135 (K), SUMO3549 (K), TAMRA-FP (S), TAMRA-FP (Y), Thiadiazole (C), Thiazolidine (C), Thiazolidine (F), Thiazolidine (H), Thiazolidine (K), Thiazolidine (Protein N-term), Thiazolidine (R), Thiazolidine (W), Thiazolidine (Y), thioacylPA (K), Thiophos-S-S-biotin (S), Thiophos-S-S-biotin (T), Thiophos-S-S-biotin (Y), Thiophospho (S), Thiophospho (T), Thiophospho (Y), Thr->Ala (T), Thr->Arg (T), Thr->Asn (T), Thr->Asp (T), Thr->Cys (T), Thr->Gln (T), Thr->Glu (T), Thr->Gly (T), Thr->His (T), Thr->Lys (T), Thr->Met (T), Thr->Phe (T), Thr->Pro (T), Thr->Ser (T), Thr->Trp (T), Thr->Tyr (T), Thr->Val (T), Thr->Xle (T), Thrbiotinhydrazide (T), Thyroxine (Y), Tiglyl (K), TMAB (K), TMAB (N-term), TMAB:2H(9) (K), TMAB:2H(9) (N-term), TMPP-Ac (K), TMPP-Ac (N-term), TMPP-Ac (Y), TMPP-Ac:13C(9) (K), TMPP-Ac:13C(9) (N-term), TMPP-Ac:13C(9) (Y), TMT (H), TMT (K), TMT (N-term), TMT (Protein N-term), TMT (S), TMT (T), TMT2plex (H), TMT2plex (K), TMT2plex (N-term), TMT2plex (Protein N-term), TMT2plex (S), TMT2plex (T), TMT6plex (H), TMT6plex (K), TMT6plex (N-term), TMT6plex (Protein N-term), TMT6plex (S), TMT6plex (T), TMTpro (H), TMTpro (K), TMTpro (N-term), TMTpro (Protein N-term), TMTpro (S), TMTpro (T), TMTpro_zero (H), TMTpro_zero (K), TMTpro_zero (N-term), TMTpro_zero (Protein N-term), TMTpro_zero (S), TMTpro_zero (T), TNBS (K), TNBS (N-term), trifluoro (L), Triiodo (Y), Triiodothyronine (Y), Trimethyl (K), Trimethyl (Protein N-term A), Trimethyl (R), Trimethyl:13C(3)2H(9) (K), Trimethyl:13C(3)2H(9) (R), Trimethyl:2H(9) (K), Trimethyl:2H(9) (R), Trioxidation (C), Trioxidation (F), Trioxidation (W), Trioxidation (Y), Tripalmitate (Protein N-term C), Tris (N), Triton (C-term), Triton (N-term), Trp->Ala (W), Trp->Arg (W), Trp->Asn (W), Trp->Asp (W), Trp->Cys (W), Trp->Gln (W), Trp->Glu (W), Trp->Gly (W), Trp->His (W), Trp->Hydroxykynurenin (W), Trp->Kynurenin (W), Trp->Lys (W), Trp->Met (W), Trp->Oxolactone (W), Trp->Phe (W), Trp->Pro (W), Trp->Ser (W), Trp->Thr (W), Trp->Tyr (W), Trp->Val (W), Trp->Xle (W), Tween20 (N-term), Tween80 (C-term), Tyr->Ala (Y), Tyr->Arg (Y), Tyr->Asn (Y), Tyr->Asp (Y), Tyr->Cys (Y), Tyr->Dha (Y), Tyr->Gln (Y), Tyr->Glu (Y), Tyr->Gly (Y), Tyr->His (Y), Tyr->Lys (Y), Tyr->Met (Y), Tyr->Phe (Y), Tyr->Pro (Y), Tyr->Ser (Y), Tyr->Thr (Y), Tyr->Trp (Y), Tyr->Val (Y), Tyr->Xle (Y), Ub-Br2 (C), Ub-fluorescein (C), Ub-VME (C), UgiJoullie (D), UgiJoullie (E), UgiJoullieProGly (D), UgiJoullieProGly (E), UgiJoullieProGlyProGly (D), UgiJoullieProGlyProGly (E), Unknown:162 (C-term), Unknown:162 (D), Unknown:162 (E), Unknown:162 (N-term), Unknown:177 (C-term), Unknown:177 (D), Unknown:177 (E), Unknown:177 (N-term), Unknown:210 (C-term), Unknown:210 (D), Unknown:210 (E), Unknown:210 (N-term), Unknown:216 (C-term), Unknown:216 (D), Unknown:216 (E), Unknown:216 (N-term), Unknown:234 (C-term), Unknown:234 (D), Unknown:234 (E), Unknown:234 (N-term), Unknown:248 (C-term), Unknown:248 (D), Unknown:248 (E), Unknown:248 (N-term), Unknown:250 (C-term), Unknown:250 (D), Unknown:250 (E), Unknown:250 (N-term), Unknown:302 (C-term), Unknown:302 (D), Unknown:302 (E), Unknown:302 (N-term), Unknown:306 (C-term), Unknown:306 (D), Unknown:306 (E), Unknown:306 (N-term), Unknown:420 (C-term), Unknown:420 (N-term), Val->Ala (V), Val->Arg (V), Val->Asn (V), Val->Asp (V), Val->Cys (V), Val->Gln (V), Val->Glu (V), Val->Gly (V), Val->His (V), Val->Lys (V), Val->Met (V), Val->Phe (V), Val->Pro (V), Val->Ser (V), Val->Thr (V), Val->Trp (V), Val->Tyr (V), Val->Xle (V), ValGly (K), VFQQQTGG (K), VIEVYQEQTGG (K), Withaferin (C), Xle->Ala (I), Xle->Ala (L), Xle->Arg (I), Xle->Arg (L), Xle->Asn (I), Xle->Asn (L), Xle->Asp (I), Xle->Asp (L), Xle->Cys (I), Xle->Cys (L), Xle->Gln (I), Xle->Gln (L), Xle->Glu (I), Xle->Glu (L), Xle->Gly (I), Xle->Gly (L), Xle->His (I), Xle->His (L), Xle->Lys (I), Xle->Lys (L), Xle->Met (I), Xle->Met (L), Xle->Phe (I), Xle->Phe (L), Xle->Pro (I), Xle->Pro (L), Xle->Ser (I), Xle->Ser (L), Xle->Thr (I), Xle->Thr (L), Xle->Trp (I), Xle->Trp (L), Xle->Tyr (I), Xle->Tyr (L), Xle->Val (I), Xle->Val (L), Xlink:B10621 (C), Xlink:BMOE (C), Xlink:BS2G[113] (K), Xlink:BS2G[113] (Protein N-term), Xlink:BS2G[114] (K), Xlink:BS2G[114] (Protein N-term), Xlink:BS2G[217] (K), Xlink:BS2G[217] (Protein N-term), Xlink:BS2G[96] (K), Xlink:BS2G[96] (Protein N-term), Xlink:BuUrBu[111] (K), Xlink:BuUrBu[111] (Protein N-term), Xlink:BuUrBu[111] (S), Xlink:BuUrBu[111] (T), Xlink:BuUrBu[111] (Y), Xlink:BuUrBu[196] (K), Xlink:BuUrBu[196] (Protein N-term), Xlink:BuUrBu[196] (S), Xlink:BuUrBu[196] (T), Xlink:BuUrBu[196] (Y), Xlink:BuUrBu[213] (K), Xlink:BuUrBu[213] (Protein N-term), Xlink:BuUrBu[213] (S), Xlink:BuUrBu[213] (T), Xlink:BuUrBu[213] (Y), Xlink:BuUrBu[214] (K), Xlink:BuUrBu[214] (Protein N-term), Xlink:BuUrBu[214] (S), Xlink:BuUrBu[214] (T), Xlink:BuUrBu[214] (Y), Xlink:BuUrBu[317] (K), Xlink:BuUrBu[317] (Protein N-term), Xlink:BuUrBu[317] (S), Xlink:BuUrBu[317] (T), Xlink:BuUrBu[317] (Y), Xlink:BuUrBu[85] (K), Xlink:BuUrBu[85] (Protein N-term), Xlink:BuUrBu[85] (S), Xlink:BuUrBu[85] (T), Xlink:BuUrBu[85] (Y), Xlink:DFDNB (K), Xlink:DFDNB (N), Xlink:DFDNB (Q), Xlink:DFDNB (R), Xlink:DMP[122] (K), Xlink:DMP[122] (Protein N-term), Xlink:DMP[139] (K), Xlink:DMP[139] (Protein N-term), Xlink:DMP[140] (K), Xlink:DMP[140] (Protein N-term), Xlink:DMP[154] (K), Xlink:DMP[154] (Protein N-term), Xlink:DSPP[210] (K), Xlink:DSPP[210] (Protein N-term), Xlink:DSPP[226] (K), Xlink:DSPP[226] (Protein N-term), Xlink:DSPP[228] (K), Xlink:DSPP[228] (Protein N-term), Xlink:DSPP[331] (K), Xlink:DSPP[331] (Protein N-term), Xlink:DSS[138] (K), Xlink:DSS[138] (Protein N-term), Xlink:DSS[155] (K), Xlink:DSS[155] (Protein N-term), Xlink:DSS[156] (K), Xlink:DSS[156] (Protein N-term), Xlink:DSS[259] (K), Xlink:DSS[259] (Protein N-term), Xlink:DSSO[104] (K), Xlink:DSSO[104] (Protein N-term), Xlink:DSSO[158] (K), Xlink:DSSO[158] (Protein N-term), Xlink:DSSO[175] (K), Xlink:DSSO[175] (Protein N-term), Xlink:DSSO[176] (K), Xlink:DSSO[176] (Protein N-term), Xlink:DSSO[279] (K), Xlink:DSSO[279] (Protein N-term), Xlink:DSSO[54] (K), Xlink:DSSO[54] (Protein N-term), Xlink:DSSO[86] (K), Xlink:DSSO[86] (Protein N-term), Xlink:DST[114] (K), Xlink:DST[114] (Protein N-term), Xlink:DST[132] (K), Xlink:DST[132] (Protein N-term), Xlink:DST[56] (K), Xlink:DST[56] (Protein N-term), Xlink:DTBP[172] (K), Xlink:DTBP[172] (Protein N-term), Xlink:DTBP[87] (K), Xlink:DTBP[87] (Protein N-term), Xlink:DTSSP[174] (K), Xlink:DTSSP[174] (Protein N-term), Xlink:DTSSP[192] (K), Xlink:DTSSP[192] (Protein N-term), Xlink:DTSSP[88] (K), Xlink:DTSSP[88] (Protein N-term), Xlink:EGS[115] (K), Xlink:EGS[115] (Protein N-term), Xlink:EGS[226] (K), Xlink:EGS[226] (Protein N-term), Xlink:EGS[244] (K), Xlink:EGS[244] (Protein N-term), Xlink:SMCC[219] (C), Xlink:SMCC[219] (K), Xlink:SMCC[219] (Protein N-term), Xlink:SMCC[237] (C), Xlink:SMCC[237] (K), Xlink:SMCC[237] (Protein N-term), Xlink:SMCC[321] (C), ZGB (K), ZGB (N-term), ZQG (K)

variable_max_per_peptide2 Maximum number of residues carrying a variable modification per candidate peptide

++++annotateAnnotation Options

PSM[ALL] Annotations added to each PSM.ALL, fragment_mz_error_median_ppm, precursor_mz_error_ppm, matched_prefix_ions_fraction, matched_suffix_ions_fraction, num_matched_peaks, matched_prefix_ions, matched_suffix_ions, longest_peptide_ion_sequence, matched_ion_current, fragment_annotation, hyperscore_zscore, ln_num_candidates, matched_ion_current_fraction, complementary_ions_fraction

self_trained_ion_priorstrue Learn per-run fragment ion likelihoods from the confident PSMs of each file and add the Percolator features of annotate:ion_prior_features to every hit. The spectra are split into two halves by scan parity. Each half trains a model on its rank-one target hits at target-decoy competition q <= annotate:ion_prior_train_fdr of the native score (their reversed sequences on the same spectra are the noise model), and every hit is scored by the model of the other half, so no PSM is scored by a model that saw its spectrum or its label. Needs annotate:ion_prior_min_psms training PSMs in each half, otherwise the features are 0. Not applied to target-only searches (decoys=ignore), which get no features. Native scores and candidate selection are unchanged. Independent of annotate:PSM.true, false

ion_prior_modelrich Contexts and outcomes of the ion priors. 'rich': ion series, precursor charge, fragment charge, relative position, the residues at the cleavage site (bond before P, bond after D or E) and whether the complementary singly charged ion matched; outcome: intensity rank x mass error (|error| / tolerance below 0.25, below 0.5, up to 1). 'basic': ion series, precursor charge, fragment charge and relative position; outcome: intensity rank.rich, basic

ion_prior_peaksall Peaks the ion priors rank and match. 'all': every peak after deisotoping, before the peaks:window_top and peaks:keep_n filters, so weak fragment ions count as evidence for the model without entering HyperScore. 'scored': the peaks that are scored.all, scored

ion_prior_max_fragment_charge2 Highest fragment charge of the ions of the ion priors; capped at the precursor charge - 1 (at least 1).1:∞

ion_prior_train_fdr0.01 Target-decoy competition q-value threshold selecting the training PSMs of annotate:self_trained_ion_priors.0.0:1.0

ion_prior_min_psms100 Minimum number of training PSMs of annotate:self_trained_ion_priors in each half of the spectra; with fewer, the features are 0.1:∞

ion_prior_features[ion_prior_llr, ion_prior_explained] Features of annotate:self_trained_ion_priors written to every hit and listed for Percolator: ion_prior_llr (summed log-likelihood ratio of the ion outcomes, signal vs reversed noise), ion_prior_explained (share of the predicted ion presence that was observed), ion_prior_topk_observed (share of the 6 ions most likely present that were observed).ion_prior_llr, ion_prior_explained, ion_prior_topk_observed

local_fragment_evidencetrue Add chance_match_surprise and mass_competition_evidence annotations and Percolator features. Uses local peak density and alternative intact/neutral-loss fragment assignments. Retains an additional peak list before window/top-N filtering, increasing memory use. Does not change native scores or candidate selection. Independent of annotate:PSM.true, false

++++peptdeepPeptDeep (ONNX) prediction-based rescoring features

enablefalse Add PeptDeep prediction-based rescoring features (ms2_cosine, ms2_spectral_angle, ms2_pearson, ms2_frac_pred_found, rt_abs_error) to every PSM. Uses the models shipped in OpenMS' 'share/OpenMS/models' unless 'peptdeep:ms2_model'/'peptdeep:rt_model' name others. Requires an OpenMS built with ONNX support.true, false

ms2_modelmodels/peptdeep_ms2_dynamic.onnx PeptDeep MS2 fragment-intensity ONNX model, used when 'peptdeep:enable' is true. A relative name is resolved against OpenMS' shared-data directory; an absolute path is used as given.

rt_modelmodels/peptdeep_rt_dynamic.onnx PeptDeep retention-time ONNX model. See 'peptdeep:ms2_model'.

instrumentQE Instrument class passed to the PeptDeep MS2 model. An instrument that is not in this list is best approximated by the closest one that is.QE, Lumos, timsTOF, SciexTOF, ThermoTOF

nce-1.0 Normalised collision energy for the PeptDeep MS2 model. Negative selects it automatically from the collision energy recorded in the spectra, refined by scoring a small grid on confident PSMs.

rt_model_typeb_spline Model mapping predicted onto observed retention time.b_spline, lowess, linear

batch_size500 Peptides per ONNX inference call.1:∞

++++peptidePeptide Options

min_size7 Minimum size a peptide must have after digestion to be considered in the search.

max_size40 Maximum size a peptide must have after digestion to be considered in the search (0 = disabled).

missed_cleavages1 Number of missed cleavages.

clip_nterm_methioninetrue Also search protein N-terminal peptides after removal of their initial methionine. The retained-M form is still searched; length, mass and missed-cleavage limits apply to each form. Set false for the previous search space.true, false

deduplicatetrue Index each exact peptidoform once before candidate selection. Protein mappings still list every protein occurrence. Across database chunks, count each peptide/charge/isotope hypothesis once; retaining queried keys adds memory per spectrum. With low_memory, the repeated peptidoforms among the candidates of a spectrum are dropped instead. Set false for occurrence-based legacy candidates.true, false

protein_mappingindex How the hits are mapped to their proteins (peptide evidences, target_decoy, protein_references, protein hits). 'index': from the digest of the fragment index, which holds every protein occurrence of a candidate; the result is that of PeptideIndexing, which runs instead wherever the index cannot reproduce it exactly (e.g. low_memory, a specificity other than full, protein-terminal modifications, a chunked database, symbols other than letters or long stretches of ambiguous residues in the database). 'PeptideIndexing': always search every hit in the whole database (Aho-Corasick), as before.index, PeptideIndexing

enzyme_specificityfull Enzyme cleavage specificity required for both peptide termini.
'full' : both termini must be enzyme-specific (canonical, e.g. tryptic).
'semi' : only one terminus needs to be enzyme-specific (semi-tryptic).
'none' : no enzyme constraint at either terminus; every substring of length
[min_size, max_size] is enumerated. Use this for immunopeptidomics
(e.g. HLA peptides 8..12mers). For very large search spaces consider
tightening 'peptide:min_size'/'peptide:max_size'.full, semi, none

motif If set, only peptides that contain this motif (provided as RegEx) will be considered.

min_mass100 Minimal peptide mass for database

max_mass9000 Maximal peptide mass for database

++++reportReporting Options

top_hits1 Maximum number of top scoring hits per spectrum that are reported.

isotope_error_conventionobserved_minus_theoretical Sign of the precursor isotope error reported for each PSM (meta value 'isotope_error', in 13C spacings of 1.00336 Da). 'observed_minus_theoretical': +1 means the observed precursor lies one 13C spacing above the peptide (its first 13C isotope peak was selected), as in MS-GF+, pepXML and Sage; PercolatorInfile and PercolatorAdapter (-out_pin, -percolator_executable) remove the offset from the precursor mass difference with this sign. The search parameters of the result record it as 'isotope_error_convention'. 'theoretical_minus_observed': the opposite sign, as written by earlier ProSE versions (no record in the search parameters); with it the Percolator input doubles the offset in dm/absdm instead of removing it.observed_minus_theoretical, theoretical_minus_observed

++++FDRFalse Discovery Rate control (requires decoys)

PSM0.0 Filter PSMs based on q-value (e.g., 0.05 = 5% FDR; 0 disables the filter). Target and decoy PSMs are filtered alike by the threshold; decoys that pass are kept (no decoy-specific stripping here — decoys are removed only at protein-FDR finalization). With 'rescore' (the default), the threshold applies to the Percolator q-values, the main score of the rescored PSMs. Without rescoring ('rescore' false, or a run that Percolator did not rescore), 0 computes no q-values: every PSM keeps its search engine score ('ln(hyperscore)') as main score, e.g. as input for Percolator or a downstream FDR step. Above 0, the target-decoy q-value (see FDR:PSM_groups) replaces the main score (the search engine score is kept as meta value 'ln(hyperscore)_score') and only the best hit of each spectrum is kept. Needs decoys ('decoys' auto or generate); with 'ignore', a threshold above 0 is skipped with a warning.0.0:1.0

PSM_groupsscored_charges Target-decoy competitions of FDR:PSM. 'pooled' ranks all PSMs together. 'scored_charges' computes q-values separately for PSMs scored with different numbers of fragment charges (scoring:fragment_charges): HyperScore grows with the number of theoretical ions, so when multiply charged fragments are scored for precursors of charge 3 and above but not for charge 2, a pooled competition is dominated by the higher precursor charges. With singly charged fragments only (deisotoped, high-resolution spectra) there is one group, as with 'pooled'. With fragment:max_charge above 2, precursor charges of 4 and above form further groups, which accept few PSMs per run (tens), so their q-values (D/T, as FalseDiscoveryRate) are coarse. A group without decoy or without target PSMs falls back to 'pooled'.scored_charges, pooled

protein0.0 Filter proteins based on picked-protein FDR q-value (e.g., 0.01 = 1% protein FDR, set to 0 to disable). Applied after PSM-level FDR on a complete protein set (single file, or the -out_merged aggregate). Setting this > 0 finalizes the result: identified decoys are removed. With 0, decoys are retained for downstream/merged FDR. Uses the picked-protein approach (Savitski et al. 2015) which pairs target and decoy proteins by accession. Needs decoys ('decoys' auto or generate).0.0:1.0

++++scoringSearch/Scoring Limits

max_candidates_per_spectrum50 The number of initial hits for which we calculate a score

fragment_chargesauto Fragment charges of the theoretical spectra that score each candidate. 'single' scores singly charged fragments only. 'multiple' adds charges up to min(precursor charge - 1, fragment:max_charge). 'auto' uses 'multiple' when the MS2 spectra are not deisotoped (fragment:deisotope=false, or a fragment tolerance above the deisotoper's limit of 0.1 Da / 100 ppm, as for ion-trap CID) and 'single' otherwise, because deisotoping converts fragments to charge 1.auto, single, multiple

methodauto Native score. 'hyperscore' is the X!Tandem HyperScore. 'mass_accuracy' weights each matched fragment's contribution to HyperScore's ion counts and intensity product by exp(-0.5 * (error / scoring:mass_error_sd)^2), with the error in ppm, so that matches near the theoretical m/z count fully and matches at the edge of the tolerance count little; exact matches score as HyperScore. The kernel is centred at 0 and suits high-resolution fragments only. 'auto' (default) uses 'mass_accuracy' for fragment tolerances in ppm within the high-resolution range (<= 100 ppm) and 'hyperscore' otherwise (Da tolerances, e.g. ion-trap CID). Matching tolerances, candidates and the unweighted match annotations are unchanged. The score type stays 'ln(hyperscore)'; the search parameters record scoring:method_resolved when the weighted score is used.hyperscore, mass_accuracy, auto

mass_error_sd7.0 Standard deviation in ppm of the Gaussian fragment mass-error kernel of scoring:method 'mass_accuracy'. Fixed (not fitted) and independent of the matching tolerance and of calibration.1.0e-06:∞

++++ionsTheoretical ion series toggles

add_y_ionstrue Add peaks of y-ions to the spectrumtrue, false

add_b_ionstrue Add peaks of b-ions to the spectrumtrue, false

add_a_ionsfalse Add peaks of a-ions to the spectrumtrue, false

add_c_ionsfalse Add peaks of c-ions to the spectrumtrue, false

add_x_ionsfalse Add peaks of x-ions to the spectrumtrue, false

add_z_ionsfalse Add peaks of z-ions (y - NH3) to the spectrum. These are not the z+1 ions of ETD-type spectra; see ions:by_activation and ions:add_zp1_ions.true, false

add_zp1_ionsfalse Add peaks of z+1 ions (z-dot, y - NH2) to the spectrum, the main C-terminal fragments of ETD, EThcD and ETciD spectra, for all spectra. ions:by_activation adds them (with c ions) for spectra recorded as electron-activated; set this, typically with ions:add_c_ions, for ETD-type data without activation information.true, false

by_activationtrue Score spectra whose precursor was activated by electrons (ETD, ECD, EThcD or ETciD, as recorded in the input file) with c and z+1 ions in addition to the ion series above. Other spectra, and spectra without activation information, use the ion series above.true, false

++++calibrationAutomatic mass accuracy calibration (two-pass search). A fast first pass on a subset of spectra estimates instrument-specific mass accuracy, then the main search uses the calibrated (typically tighter) tolerances for better discrimination.

enabledfalse If enabled, run a fast calibration pass on a subset of spectra before the main search. Estimates tighter precursor and fragment tolerances from confident PSMs. The fragment index is NOT rebuilt — only query-time tolerances are tightened. Inspired by MSFragger's calibrate_mass and OpenNuXL's autotune.true, false

subset_ratio0.1 Fraction of spectra (by TIC, highest first) used for the calibration pass (0.0-1.0).0.01:1.0

min_psms50 Minimum number of confident PSMs required for calibration. If fewer are found, calibration is skipped and the user-configured tolerances are used.1:∞

++++database

chunk_size0 Split the protein database into chunks of at most this many proteins for fragment index building. 0 = disabled (load entire database at once). Enable for very large databases (e.g. MHC-II immunopeptidomics with variants) that exceed available memory. Each chunk builds its own fragment index; results are merged across chunks before post-processing. Calibration (when enabled) runs on a strided, size-bounded sample of the full decoy-augmented database — sample size is tied to chunk_size so calibration memory respects the same budget as main-search chunks. In multi-file mode (-in a.mzML b.mzML), the chunk-major path builds each chunk's fragment index once and scores all files against it before moving to the next chunk. Note that chunk_size bounds only the fragment-index memory: the chunk-major schedule holds ALL input files' preprocessed MS2 spectra in memory for the whole search, so budget for their sum as well, or split very large cohorts across separate ProSE invocations.0:∞