[Antigenic polysaccharides of bacteria. 27. Structure of the O-specific polysaccharide chain of lipopolysaccharides from Pseudomonas syringae pv. atrofaciens 2399, phaesolica 120a and Pseudomonas holci 8299 belonging to serotype VI].

Lipopolysaccharides from Pseudomonas syringae pvs atrofaciens 2399. phaseolicola 120a and Pseudomonas holci 8299, belonging to serogroup VI. possess an identical polysaccharide chain composed of D-rhamnose and D-fucose. On the hasis of methylation, partial acid hydrolysis, 1H- and 13C-NMR data, it was concluded that the backbone of the polysaccharide represents D-rhamnan built up of tetrasaccharide repeating units and alpha-D-fucofuranose residues are attached to the backbone as the monosaccharide branches. The following structure of the repeating unit is established: (Formula: see text).