Cyrus,
For XPRESS, minimally you just need to specify:
- which residues are labeled
- the mass difference between the light and heavy forms of the label
We have the precursor m/z of the identified peptide and can calculate
the precursor m/z of the isotopic pair just by knowing which residues
are
Hi,
I have a quick question about quantificaiton of SILAC samples using 13-
C6-Lysine as my heavy isotope.
I also tried reading through previous threads, and couldn't find a
direct answer to this question.
My questions:
(1) Does XPRESS support either fixed or variable modifications?
(2) I can see
