title: Structure of the lipopolysaccharide O-antigen of Pseudomonas cepacia serotype A.
abstract: The O-antigenic polysaccharides of the lipopolysaccharides produced by three isolates of Pseudomonas cepacia serogroup A were analysed by composition, methylation, periodate oxidation, and two-dimensional nuclear magnetic resonance methods. They were found to be identical linear unbranched polymers of a repeating trisaccharide unit containing 2-acetamido-2-deoxy-D-galactose and L-rhamnose residues (2:1) and have the structure [-->3)-alpha-D-GalpNAc-(1-->3)-beta-D-GalpNAc-(1-->4)-alpha-L-Rhap -(1-->]n.
authors.affiliation: Institute for Biological Sciences, National Research Council, Ottawa, ON, Canada.
authors.forename: L M
authors.initials: LM
authors.lastname: Beynon
authors.forename: M B
authors.initials: MB
authors.lastname: Perry
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D008070:Lipopolysaccharides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D008969:Molecular Sequence Data; D019081:O Antigens; D010084:Oxidation-Reduction; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D011549:Pseudomonas / Q000276:immunology*; D012091:Repetitive Sequences, Nucleic Acid
chemical_list: D008070:Lipopolysaccharides; D019081:O Antigens; D011135:Polysaccharides, Bacterial