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MS/MS analysis of N-glycan precursor ions in MS spectra. Precursor ions were subjected to MS/MS analysis to obtain cleavages, including glycosidic cleavages, and cross-ring cleavages. Structures of cleavage ions and m/z-values are shown in tandem mass spectra. Two major N-glycan peaks were indicated: (A) m/z 1905.634, and (B) 2288.840.
