The position is the position/index of the residue that is modified in the peptide. So "2 and 5" in your example below.
On Mon, Mar 7, 2011 at 2:09 PM, John Prince <[email protected]> wrote: > I just want to get this right in my pepxml emitter: > A modification_info object describes a peptide that has been modified. It > has an attribute, modified_peptide where the peptide is annotated to show > where the modifications occur. The modification_info object also has a > child element called mod_aminoacid_mass. > The mod_aminoacid_mass has a position and a mass attribute. The > documentation for the position says: "modified aminoacid position in peptide > [ranging from 1 to peptide length]" > > Should the position of mod_aminoacid_mass specify a position on the > modified_peptide string (e.g. "PE#PTI*DE", where the two positions would be > 3 and 7), or does it specify an amino acid position on the unmodified > peptide, i.e., the peptide attribute in the search_hit element (e.g., > "PEPTIDE", where the two positions would be 2 and 5)? > Thanks! > > -- > You received this message because you are subscribed to the Google Groups > "spctools-discuss" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/spctools-discuss?hl=en. > -- You received this message because you are subscribed to the Google Groups "spctools-discuss" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/spctools-discuss?hl=en.
