Structure of the O10 antigen of Stenotrophomonas (Xanthomonas) maltophilia

A polysaccharide containing l-rhamnose and l-xylose was isolated from the lipopolysaccharide extracted from the cell walls of the reference strain for Stenotrophomonas (Xanthomonas) maltophilia serogroup O10. By means of NMR studies and methylation analysis, the repeating unit of the polymer was identified as a branched tetrasaccharide of the structure shown.