title: Structure of the major exopolysaccharide produced by Azotobacter beijerinckii B-1615.
abstract: A. beijerinckii strain B-1615 produced two acidic exopolysaccharides in the ratio approximately 9:1. The minor polysaccharide contained mannuronic and guluronic acids in the ratio 2.3:1 and is a bacterial alginate. The major polysaccharide consisted of D-galactose, L-rhamnose, and pyruvic acid in the ratios 2:1:1 and was acetylated. On the basis of methylation analysis, and 1H- and 13C-n.m.r. spectroscopy of the polysaccharide before and after removal of the pyruvic acid residues and O-deacetylation, it was concluded that the major polysaccharide had the structure [formula; see text] with up to 1.5 OAc groups per repeating unit.
authors.affiliation: N.D. Zelinsky Institute of Organic Chemistry, Academy of Sciences of the U.S.S.R., Moscow.
authors.forename: L M
authors.initials: LM
authors.lastname: Likhosherstov
authors.forename: S N
authors.initials: SN
authors.lastname: Senchenkova
authors.forename: A S
authors.initials: AS
authors.lastname: Shashkov
authors.forename: V A
authors.initials: VA
authors.lastname: Derevitskaya
authors.forename: I V
authors.initials: IV
authors.lastname: Danilova
authors.forename: I V
authors.initials: IV
authors.lastname: Botvinko
mesh_terms: D001395:Azotobacter / Q000737:chemistry*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002241:Carbohydrates / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D002241:Carbohydrates; D011134:Polysaccharides