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. Author manuscript; available in PMC: 2018 May 29.
Published in final edited form as: Anal Chem. 2017 Oct 2;89(20):10734–10743. doi: 10.1021/acs.analchem.7b01730

Figure 6.

Figure 6

Analysis of Pronase digest of fetuin by permethylation of glycopeptides and mass spectrometry: (A) MALDI-MS spectrum of multiple glycoforms of permethylated glycopeptides “NCS”, “NDSR”, and “NGSYL” of fetuin; (B) ESI-MS spectra of O-glycans (released during permethylation) and multiple glycoforms of permethylated N-linked glycopeptides “NCS”, “NDSR”, and “NGSYL” of fetuin; and (C) HCD MS2 of permethylated glycopeptide “NDSR” of fetuin with triantennary sialylated structures. *loss of NMe3; (Me)Cα-methylation.