title: The determination of complex carbohydrate structure by using carbonyl carbon resonances of peracetylated derivatives.
abstract: Carbonyl carbon resonances have been assigned to specific acetyl substituents in peracetylated derivatives of a variety of di- and tri-saccharides that occur as substructures of N- and O-linked glycoprotein glycans. Assignments were made by correlating shifts of these resonances to previously assigned pyranoid-ring proton and acetyl methyl proton shifts by means of 2D 13C-1H shifts correlation spectra. It was found that, when the shift assignment data for carbonyl carbon atoms, acetyl methyl protons, and pyranoid-ring protons are plotted in three dimensions, patterns appear that are unique to the different types of residues occurring in a parent structure. It is suggested that these shift data can complement existing 1H- and 13C-n.m.r. methods for determining primary structures of complex carbohydrates.
authors.affiliation: Department of Chemistry, University of Texas, Richardson 75083-0688.
authors.forename: W J
authors.initials: WJ
authors.lastname: Goux
mesh_terms: D000107:Acetylation; D002236:Carbohydrate Conformation; D002247:Carbon Isotopes; D004187:Disaccharides; D006023:Glycoproteins; D006859:Hydrogen; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008958:Models, Molecular; D013329:Structure-Activity Relationship; D014312:Trisaccharides
chemical_list: D002247:Carbon Isotopes; D004187:Disaccharides; D006023:Glycoproteins; D007202:Indicators and Reagents; D014312:Trisaccharides; D006859:Hydrogen