To specify which columns to display for peptide results:

  • Navigate to the run you would like to work with (see Viewing an MS2 Run).
  • In the Peptides section, select Grid Views > ProteinProphet.
  • Then Grid Views > Customize Grid.
  • In the Available Fields pane, select which columns to display in the current grid.
  • Click Save to name and save the grid.

The currently displayed columns appear in the Selected Fields pane. You can edit the columns that appear in this list manually for finely tuned control over which columns are displayed in what order.

Available Protein Columns

The following table describes some of the available protein columns. Not all columns are available for all data sets.

Protein ColumnColumn AbbrevDescription
Protein The name of the sequence from the protein database.
SequenceMass The mass of the sequence calculated by adding the masses of its amino acids.
PeptidesPP PepsThe number of filtered peptides in the run that were matched to this sequence.
UniquePeptidesPP UniqueThe number of unique filtered peptides in the run that were matched to this sequence.
AACoverage The percent of the amino acid sequence covered by the matched, filtered peptides.
BestName A best name, either an accession number or descriptive word, for the identified protein.
BestGeneName The most useful gene name associated with the identified protein.
Description Short description of the protein’s nature and function.
GroupNumberGroupA group number assigned to the ProteinProphet group.
GroupProbabilityProbProteinProphet probability assigned to the protein group.
PctSpectrumIdsSpectrum IdsPercentage of spectrum identifications belonging to this protein entry.  As a semi-quantitative measure, larger numbers reflects higher abundance.
ErrorRate The error rate associated with the ProteinProphet probability for the group.
ProteinProbabilityProbProteinProphet probability assigned to the protein(s).
FirstProtein ProteinProphet entries can be composed of one or more indistinguishable proteins and are reflected as a protein group. This column represents the protein identifier, from the protein sequence database, for the first protein in a protein group.
FirstDescription Protein description of the FirstProtein.
FirstGeneName Gene name, if available, associated with the FirstProtein.
FirstBestName The best protein name associated with the FirstProtein. This name may come from another protein database file.
RatioMeanL2H MeanThe light-to-heavy protein ratio generated from the mean of the underlying peptide ratios.
RatioStandardDevL2H StdDevThe standard deviation of the light-to-heavy protein ratio.
RatioNumberPeptidesRatio PepsThe number of quantified peptides contributing to the protein ratio.
Heavy2LightRatioMeanH2L MeanThe heavy-to-light protein ratio generated from the mean of the underlying peptide ratios.
Heavy2LightRatioStandardDevH2L StdDevThe heavy-to-light standard deviation of the protein ratio.

 

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