title: [Antigenic determinants of bacteria. The structure of the repeating unit of a specific polysaccharide from Shigella boydii type 7].
abstract: Acid hydrolysis of the antigenic lipopolysaccharide from Shigella boydii type 7 afforded a specific polysaccharide composed of 2-acetamido-2-deoxy-D-glucose, D-glucose, D-galactose, 5-acetamido-3,5,7,9-tetradeoxy-7-[(3R)-3-hydroxybutyramido]-L- glycero-L-manno-nonulosonic acid (NonN2A) and acetic acid residues in the 1:1:2:1:1 ratio. From the results of methylation analysis, hydrogen fluoride solvolysis and Smith degradation, the structure of the repeating unit of the specific polysaccharide was dedused as: -2) Galf (beta 1-3)GlcNAcp (alpha 1-8)NonN2A (beta 2-6) Galp (alpha 1-6) Glcp (alpha 1-4 increases Ac. The 13C NMR spectrum of the polysaccharide was interpreted, and the spectral data fully confirmed the structure of the polysaccharide repeating unit.
mesh_terms: D000942:Antigens, Bacterial / Q000032:analysis*; D002240:Carbohydrate Sequence; D000939:Epitopes / Q000032:analysis*; D008070:Lipopolysaccharides / Q000032:analysis / Q000276:immunology*; D009682:Magnetic Resonance Spectroscopy; D019081:O Antigens; D012760:Shigella / Q000276:immunology*; D012761:Shigella boydii / Q000145:classification / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial; D000939:Epitopes; D008070:Lipopolysaccharides; D019081:O Antigens
vernacular_title: Antigennye polisakharidy bakteriĭ. Stroenie povtoriaiushchegosia zvena spetsificheskogo polisakharida Shigella boydii, tip 7.