title: [Experimental and theoretical conformation analysis of the O-antigenic polysaccharide from Pseudomonas cepacia strain 3181. I. Disaccharide links].
abstract: Nuclear Overhauser effects, with preirradiation of glycoside bond anomeric protons, coupling constants 3J C3, H1' and 3J C1', H4 and linkage optical rotations A were measured for L-Rha beta 1-3-L-Rha alpha 1-OMe and L-Rha alpha 1-3-L-Rha alpha 1-OMe which are the models of the disaccharide units of the Pseudomonas cepacia polysaccharide. Theoretical conformational analysis was carried out in terms of a mechanical molecular model approximation. The spatial structures of these disaccharides as well as of D-Rha alpha 1-2-D-Rha beta 1-OMe in aqueous solutions were discussed basing on the obtained results.
mesh_terms: D000942:Antigens, Bacterial / Q000032:analysis*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D004187:Disaccharides / Q000032:analysis*; D008070:Lipopolysaccharides / Q000032:analysis*; D009682:Magnetic Resonance Spectroscopy; D008962:Models, Theoretical; D019081:O Antigens; D011549:Pseudomonas / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial; D004187:Disaccharides; D008070:Lipopolysaccharides; D019081:O Antigens
vernacular_title: Eksperimental'nyĭ i teoreticheskiĭ konformatsionnyĭ analiz O-antigennogo polisakharida Pseudomonas cepacia shtamma 3181. I. Disakharidnye zven'ia.