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Detail of the MS/MS-spectrum (deconvoluted to singly charged ions) of glycopeptide AS 507–526 NHTHPLKPEIQPFPQVASER (trypsin digest) (glycosylation site N-507). The precursor ion m/z 4529.9814 was successively fragmented due to the loss of 2 NeuAc, 4 HexNAc and 5 Hex (glycan mass 2204.7724) Monosaccharid masses: NeuAc 291, HexNAc 203, Hex 162.
