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. 2018 Feb 1;8:2117. doi: 10.1038/s41598-018-20331-2

Figure 3.

Figure 3

Mascot annotated O-glycopeptide MS2 spectra of fetuin using stepped NCE values. Bovine fetuin was digested with trypsin, analyzed by LC-MS using the stepped NCE function (15, 25 and 35) and searched against the custom O-glycoprotein database. Mascot annotated mono- (A,C) and di-sialylated (B,D) core-1 O-linked glycopeptide spectra from two different peptide sequences.