Mascot: The trusted reference standard for protein identification by mass spectrometry for 25 years

Exercise MSMS5

Topic

Phosphopeptides

Requirements

User access to any Mascot server, including the Matrix Science public web site.

Experimental

Search SwissProt with Trypsin; 2 missed cleavages; Phosphorylation of Ser, Thr, and Tyr as variable modifications; 0.6 Da for peptide tolerance and 0.4 Da for fragment tolerance; ESI-QUAD-TOF.

Data

Right-click this link: MSMS5.mgf, and choose Save target as or Save link as

Questions

  1. Can you be sure which residue is phosphorylated in FKGPGDTSNFDDYEEEEIRVSINEK?
  2. How about TWTLCGTPEYLAPEIILSK?

 

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