Among the 691 glycopeptides analyzed, approximately 20% (136 glycopeptides) were identified by all three MS/MS methods. HCD identified 55 unique glycopeptides, while UVPD and EThcD identified 105 and 245, respectively (Figure ). Inspection of the glycan compositions revealed a considerable number of core 3 glycans (i.e., containing a GalNAc and a GlcNAc on the non-reducing end) (Figure ).