title: Structural characterization of the serotype O:5 O-polysaccharide antigen of the lipopolysaccharide of Escherichia coli O:5.
abstract: The structure of the antigenic O-polysaccharide component of the smooth lipopolysaccharide produced by Escherichia coli serotype O:5 was investigated by composition, methylation, and periodate oxidation methods, and by 1D and 2D nuclear magnetic resonance spectroscopy. The antigenic O-chain was determined to be a high molecular weight polysaccharide composed of repeating tetrasaccharide units containing 2-acetamido-2-deoxy-D-galactose, D-galactose, D-ribose, and 3-acetamido-3,6-dideoxy-D-glucose and having the structure -[-4)-beta-D-Galp-(1-3)-alpha-D-GalpNAc-(1-4)-beta-D-Quinp3NAc-(1- 3)-beta-D-Ribf-(1-]-.
authors.affiliation: Institute for Biological Sciences, National Research Council, Ottawa, ON, Canada.
authors.forename: L L
authors.initials: LL
authors.lastname: MacLean
authors.forename: M B
authors.initials: MB
authors.lastname: Perry
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002849:Chromatography, Gas; D004926:Escherichia coli / Q000737:chemistry* / Q000145:classification* / Q000276:immunology; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D015394:Molecular Structure; D019081:O Antigens / Q000737:chemistry* / Q000302:isolation & purification; D011108:Polymers / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D019081:O Antigens; D011108:Polymers