title: Structures of the O21 and O25 antigens of Stenotrophomonas maltophilia.
abstract: The O-specific side-chain polymers from Stenotrophomonas maltophilia serogroups O21 and O25 were isolated from the lipopolysaccharides of the reference strains. The O21 polymer contained D-arabinose, 2-amino-2-deoxy-D-glucose and 2-amino-2-deoxy-D-galactose in equal proportions. Methylation analysis and NMR spectroscopy showed that the polysaccharide is based on a branched trisaccharide repeating unit of the structure shown below. The O25 polymer is linear with a disaccharide repeating unit identical to that forming the backbone of the O21 polymer.
authors.affiliation: Faculty of Science and the Environment, Department of Chemistry, University of Hull, UK.
authors.forename: L
authors.initials: L
authors.lastname: Galbraith
authors.forename: S G
authors.initials: SG
authors.lastname: Wilkinson
mesh_terms: D002240:Carbohydrate Sequence; D008070:Lipopolysaccharides / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008969:Molecular Sequence Data; D019081:O Antigens / Q000737:chemistry*; D020615:Stenotrophomonas maltophilia / Q000737:chemistry / Q000276:immunology*
chemical_list: D008070:Lipopolysaccharides; D019081:O Antigens; C410151:O21 antigen, Stenotrophomonas; C410152:O25 antigen, Stenotrophomonas