The peptide table records the details for each peptide identification, which is in turn used to identify the proteins in a GPM result file. If a GPM result file had no successful protein identifications, there will be no entries in the peptide table associated with it through the protein table.
Columns:
- pepid: the unique identifier for a specific peptide record.
- proid: the unique identifier for the protein with which this peptide identification is associated.
- seq: the residue sequence of the peptide.
- mh: the mass (in Daltons) of the peptide, as measured by the instrument which generated the original data file.
- expect: the base-10 logarithm of the chance that the identification of this protein was an accidental random match. E.g., if the expect value is -4.0, the odds of this peptide identification being a random match are 1 in 10,000.
- start: the start location of this peptide's residue sequence in its associated protein residue sequence.
- end: the end location of this peptide's residue sequence in its associated protein residue sequence.
- charge: the charge of the ion as measured by the insturment which generated the original data file.
- delta: the difference between the mass as measured by the instrument and the theoretically calculated mass given the peptide's residue sequence.
- dida: the 1-based sequence of this mass spectrum in the original data file.
- didb: the identifier for this particular mass spectrum.
- didc: the 1-based sequence of specific measurement of this mass spectrum.