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. Author manuscript; available in PMC: 2011 Mar 1.
Published in final edited form as: Biochem Pharmacol. 2009 Oct 27;79(5):784–791. doi: 10.1016/j.bcp.2009.10.007

Fig. 2. Identification of Lys-402 as an acetylation site.

Fig. 2

Q-TRAP MS/MS fragmentation of parent ion [M+3H]3+ at m/z 881.54 yielded y- and b-ion series consistent with acetylated peptide QNC(carbamidomethylated)ELFEQLGEYK*FQNALLVR. The asterisk * indicates +42 m/z shift in ion mass as compared to native peptide ions.