Technical Overview, peptide table

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(New page: 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 ...)
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*'''proid''': the unique identifier for the protein with which this peptide identification is associated.
*'''proid''': the unique identifier for the protein with which this peptide identification is associated.
*'''seq''': the residue sequence of the peptide.
*'''seq''': the residue sequence of the peptide.
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*'''mh''': the mass-to-charge ratio (mass measured in Daltons) of the peptide, as measured by the instrument which generated the original data file.
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*'''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.
*'''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.
*'''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.
*'''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.
*'''charge''': the charge of the ion as measured by the insturment which generated the original data file.
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*'''delta''': the difference between the mass-to-charge ratio as measured by the instrument and the theoretically calculated mass-to-charge ratio given the peptide's residue sequence and charge measured by the instrument.
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*'''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.
*'''dida''': the 1-based sequence of this mass spectrum in the original data file.
*'''didb''': the identifier for this particular mass spectrum.
*'''didb''': the identifier for this particular mass spectrum.
*'''didc''': the 1-based sequence of specific measurement of this mass spectrum.
*'''didc''': the 1-based sequence of specific measurement of this mass spectrum.

Revision as of 18:43, 16 February 2009

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.
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