Structure of the 0-antigen of Yersinia pseudotuberculosis 0:4a revised

摘要

The 0-specific polysaccharide was isolated by mild acid degradation of the lipopolysaccharide of Yersinia pseudotuberculosis O:4a and studied by NMR spectroscopy, including 2D ROESY and 1H, 13C HMBC experiments. The following structure of the pentasaccharide repeating unit of the polysaccharide was estab_lished, which differs from the structure reported earlier [Gorshkova, R. P. et al., Bioorg. Khim. 1983, 9, 1401-1407] in the linkage modes between the monosaccharides: