title: Structure of the repeating oligosaccharide from the lipopolysaccharide of the nitrogen-fixing bacterium Acetobacter diazotrophicus strain PAL 5.
abstract: Acetobacter diazotrophicus is an acid-tolerant nitrogen-fixing bacterium found in roots, rhizosphere, stems, and leaves of sugar cane (Saccharum officinarum) cultivated in Brazil. The O-polysaccharide from the lipopolysaccharide of the root isolate strain PAL 5 has been determined by a combination of methylation analysis and two-dimensional high field NMR spectroscopy. The pentasaccharide repeat has the structure: [formula: see text] Minor resonances in the NMR spectra are consistent with the presence of a proportion of repeating units which lack the beta-D-Glc side-chain.
authors.affiliation: Instituto de Microbiologia, Universidade Federal do Rio de Janeiro, Brasil.
authors.forename: J O
authors.initials: JO
authors.lastname: Previato
authors.forename: C
authors.initials: C
authors.lastname: Jones
authors.forename: M P
authors.initials: MP
authors.lastname: Stephan
authors.forename: L P
authors.initials: LP
authors.lastname: Almeida
authors.forename: L
authors.initials: L
authors.lastname: Mendonça-Previato
mesh_terms: D000091:Acetobacter / Q000737:chemistry*; D002240:Carbohydrate Sequence; D008070:Lipopolysaccharides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D008969:Molecular Sequence Data; D009586:Nitrogen Fixation / Q000502:physiology*; D009844:Oligosaccharides / Q000737:chemistry*
chemical_list: D008070:Lipopolysaccharides; D009844:Oligosaccharides