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Reputable Mentor II
Reputable Mentor II
Snovida SI, Bodnar ED, Viner R, Saba J, Perreault H.
Carbohydr Res. 2010 Apr 19;345(6):792-801.
In this report we describe an on-column method for glycopeptide enrichment with cellulose as a solid-phase extraction material. The method was developed using tryptic digests of several standard glycoproteins and validated with more complex standard protein digest mixtures. Glycopeptides of different masses containing neutral and acidic glycoforms of both N- and O-linked sugars were obtained in good yield by this method. Upon isolation, glycopeptides may be subjected to further glycoproteomic and glycomic workflows for the purpose of identifying glycoproteins present in the sample and characterizing their glycosylation sites, as well as their global and site-specific glycosylation profiles at the glycopeptide level. Detailed structural analysis of glycoforms may then be performed at the glycan level upon chemical or enzymatic release of the oligosaccharides. Aiming at complementing other purification methods, this technique is extremely simple, cost-effective, and efficient. Glycopeptide enrichment was verified and validated by nano liquid chromatography-tandem mass spectrometry (LC-MS/MS) combining electron-transfer dissociation (ETD) and collision-activated dissociation (CAD) fragmentation techniques.
Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada.
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