STRUCTURE OF O-SPECIFIC POLYSACCHARIDE OF LIPOPOLYSACCHARIDE FROM YERSINIA-BERCOVIERI 0 10/

O-specific polysaccharide composed of D-rhamnose and 4-C-(L-glycero-1- hydroxyethyl)-D-xylo-hexopyranose (yersiniose A) residues was obtained on mild acid degradation of the Yersinia bercovieri lipopolysaccharid e. On the basis of H-1- and C-13-NMR data, methylation studies and Smi th degradation, the following structure was suggested for the polysacc haride repeating unit: --> 3)-alpha-D-Rha p-(1 --> 3)-alpha-D-Rha p-(1 --> 2 up alpha-Yer A p-1