Hi Everyone,

I've tried to run StPeter on a prox.xml file from a sample that was labeled 
with TMT 126. This was not quantified with Libra, just trying to identify 
peptides, so I set the 126 mass as a fixed mass for lysine under fixed 
modifications and searched with comet. I have peptide IDs and may proteins 
identified with this approach, showing K[254] for the amino acid and the 
mod. I figured that setting up StPeter this way shouldn't an issue since 
this can be done with other fixed mods like with cysteine. Any thoughts?

Best,

Adam


StPeter: MS2 intensity-based label-free quantification
Copyright 2015-2017, Jason Winget, Michael Hoopmann, Institute for Systems 
Biology
Version 1.2.0 October 11 2017
****** BEGIN StPeter ANALYSIS ******
 Time at start of analysis: Thu Nov 09 16:46:36 2017

 Parameters:
  degenerate peptides = no
  fdr = 0.01
  sample load = 0
  tolerance = 0.4
  intensities = no

 Reading protXML: 
c:/TPP/data/20171108_EL-2017-00005268/126/interact.ipro.prot.xml
ERROR: Unknown modification: K[254]
Please report to authors.

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