Technical Overview, aa table

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The aa table records the amino acid modifications or mutations found on a given peptide. A single peptide can have zero or one associated mutation, and zero or more modifications, limited only by the number of residues in the peptide sequence.


  • aaid: the unique identifier for a single modification or mutation.
  • pepid: the unique identifier for the peptide with which this modification or mutation is associated.
  • type: the residue which has been modified or mutated.
  • at: the location of the residue in the residue sequence of the associated peptide, numbered from the beginning of the protein.
  • modified: the mass change (in Daltons) to the peptide, dictated by the modification or mutation.
  • pm: the resulting residue to which the specified residue location has mutated. This will be blank if the change associated with this aaid is a modification; otherwise it will be a single character denoting the mutated residue.
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