[The structure of the O-specific polysaccharide chain of the lipopolysaccharide of Yersinia pseudotuberculosis serovar VII].

An O-specific polysaccharide of Yersinia pseudotuberculosis serovar VII has been isolated and characterized. The polysaccharide consists of colitose, D-glucose and 2-acetamido-2-deoxy-D-galactose in the ratio 1 : 2 : 2. From the results of methylation analysis, partial acid hydrolysis, 1H and 13C NMR spectroscopy the structure of the repeating unit of the O-specific polysaccharide is deduced as follows: