Figure 6. CID analysis of the major glycopeptide of Cit s 1.
CID was performed on the form of the peptide VTSDQLNNTL (peptide CT14) putatively modified with an MMXF glycan; the glycan attached to the peptide could be fully sequenced (fragments with m/z between 1104 and 2279). Smaller fragments of the glycan alone were also observed with m/z between 204 and 822. The glycans are depicted using the nomenclature of the Consortium for Functional Glycomics (http://www.functionalglycomics.org); see also Figure 2.