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1. (Article ID: 1869)
 
Knirel YA, Tanatar NV, Soldatkina MA, Zakharova IY
Antigenic polysaccharides of bacteria. 35. Structural determination of polysaccharide chains of the Pseudomonas cepacia IMV 4176 and IMV 4202 (serotype 3) lipopolysaccharides
Bioorganicheskaya Khimia = Bioorganic Chemistry [Russian] 14(12) (1988) 1684-1689
 

On mild acid degradation of the Pseudomonas cepacia strain IMV 4176 lipopolysaccharide, two polysaccharides were obtained, one of which is a homopolymer of N-acetyl-D-galactosamine and the other is composed of equal amounts of N-acetyl-D-galactosamine and D-ribose. Partial hydrolysis with aqueous oxalic acid caused depolymerization of the heteropolysaccharide, and the homopolysaccharide was isolated in the individual state. On the basis of methylation and 13C NMR analysis, it was concluded that both polysaccharides are built up of disaccharide repeating units having the following structures: →4)-α-D-GalpNAc-(1→4)-β-D-GalpNAc-(1→ and →4)-α-D-GalpNAc-(1→2)-β-D-Ribf-(1→. The heteropolysaccharide from P. cepacia strain 4176 is identical by the structure of the repeating unit to the O-specific polysaccharide of P. cepacia strain IMV 4202 (serotype 3), Pseudomonas aeruginosa O12 and Serratia marcescens O14.

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