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- W1979967029 abstract "We have investigated the potential of structural elucidation of O-linked glycopeptides by post-source decay matrix-assisted laser desorption ionization mass spectrometry (PSD-MALDI-MS). In order to establish detailed fragmentation patterns and to dissect fragment ions with and without carbohydrate content, the same O-linked MUC1-derived glycopeptides with acetylated and non-acetylated sugars were analysed and compared. Furthermore, we were interested to examine possible differences in the fragmentation between glycopeptides with acetylated and non-acetylated sugars. The obtained PSD-MALDI-MS spectra showed a rather complete set of fragmentation data which allows us to localize the glycan on the peptide, in parallel with sequencing a short glycan and the backbone peptide. Fragmentations of the sugars were dominated by inter-ring cleavages at the glycosidic bond. Intra-ring cleavage did also occur from the non-reducing end, but to a much lower extent. The fragmentation of the peptide backbone was not changed either by acetylated or non-acetylated sugars. Glycosylated peptide fragments occurred as fully glycosylated fragment ions, partially deglycosylated ions and completely deglycosylated ions, and was not influenced by the acetylation of sugars. However, differences occurred in the quality and quantity of fragment ions from the non-reducing end of the glycan part when comparing acetylated with non-acetylated glycopeptides. © 1997 John Wiley & Sons, Ltd." @default.
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- W1979967029 date "1997-08-30" @default.
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- W1979967029 title "Structure Analysis of Acetylated and Non-acetylated O-Linked MUC1-Glycopeptides by Post-source Decay Matrix-assisted Laser Desorption/Ionization Mass Spectrometry" @default.
- W1979967029 doi "https://doi.org/10.1002/(sici)1097-0231(19970830)11:13<1387::aid-rcm28>3.0.co;2-j" @default.
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