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. Author manuscript; available in PMC: 2013 May 31.
Published in final edited form as: J Proteomics Bioinform. 2012 May 31;5:127–134. doi: 10.4172/jpb.1000224

Figure 5.

Figure 5

(a) CID MS/MS of the fucosylated glycopeptide (SN(+GlcNAc-Fuc)ATTDEHGLVQF) at m/z 884.6. The major fragment at m/z 811.6 is the product ion after neutral loss of fucose from the precursor ion. Minimal peptide backbone fragmentation was observed. (b) CID MS3 of m/z 811.6 from (a) showed extensive fragmentation along the peptide backbone, providing both peptide sequence information and the glycosylation site. (c) CID MS/MS of the non-fucosylated glycopeptide (SN(+GlcNAc)ATTDEHGLVQF) at m/z 811.6. (c) has great similarity with (b), revealing presence of both fucosylation and non-fucosylation at the same site.