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. Author manuscript; available in PMC: 2018 Apr 12.
Published in final edited form as: Chem Rev. 2017 Aug 18;118(3):1199–1215. doi: 10.1021/acs.chemrev.7b00145

Figure 4.

Figure 4

Detection of ions of AMPylated peptide ions by ESI-MS/MS. (A) MS/MS spectrum of unmodified peptide–AAAHAAATVHV spectra analyzed by ESI-MS/MS. (B) MS/MS spectrum of AMPylated peptide–AAAHAAAT(amp)VHV spectra analyzed by ESI-MS/MS. Major unique ions detected are indicated with an asterisk (*). (C) Formation of unique ions detected of AMPylated peptides. “X” indicates the mass of the modified peptide fragment. Reproduced from ref 16. Copyright 2011, with permission from Springer.