title: Structural studies of the capsular polysaccharide from Aerococcus viridans var. homari.
abstract: The capsular polysaccharide from Aerococcus viridans var. homari has been investigated, using n.m.r. spectroscopy, methylation analysis, and specific degradations as the main methods. The polysaccharide is composed of tetrasaccharide repeating-units having the following structure. (Formula; see text) In this structure, D-QuiN stands for 2-amino-2,6-dideoxy-D-glucose (quinovosamine). Two of the three acidic sugars found, namely, L-altruronic acid and 4-O-[(S)-1-carboxyethyl]-D-glucose, have not been found in any other natural source. As evident from the n.m.r. spectra, the L-altruronic acid is not present in the 1C4 conformation, but flips to a conformation close to this on carboxyl reduction.
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, University of Stockholm, Sweden.
authors.forename: K
authors.initials: K
authors.lastname: Hermansson
authors.forename: L
authors.initials: L
authors.lastname: Kenne
authors.forename: B
authors.initials: B
authors.lastname: Lindberg
authors.forename: B
authors.initials: B
authors.lastname: Arie
authors.forename: R G
authors.initials: RG
authors.lastname: Brown
authors.forename: J E
authors.initials: JE
authors.lastname: Stewart
mesh_terms: D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008969:Molecular Sequence Data; D015394:Molecular Structure; D011135:Polysaccharides, Bacterial / Q000737:chemistry* / Q000302:isolation & purification; D013289:Streptococcaceae / Q000032:analysis*
chemical_list: D011135:Polysaccharides, Bacterial