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. 2022 Mar 4;94(10):4343–4351. doi: 10.1021/acs.analchem.1c05068

Figure 5.

Figure 5

Structural characterization of two elongated O-GalNAc core2 isomers. (A) EICs for glycan composition H3N3S2 (m/z 908.841, 2+) in the HaCaTWT sample, indicating the presence of two isomers (a and b). The inset shows the full elution range, highlighting the retention time area of the two isomers. (B) MS/MS spectrum of the first eluting species. (C) MS/MS spectrum of the second eluting species. All annotated peaks are 1+, glycan cartoons represent B and Y ions, and underlined m/z values in panel (B) indicate the diagnostic ions that allow the differentiation between the two structures.