THE STRUCTURE OF THE O-SPECIFIC POLYSACCHARIDE FROM ESCHERICHIA-COLI O113 LIPOPOLYSACCHARIDE

The O-specific polysaccharide from Escherichia coli O113 lipopolysacch aride was separated from the core and lipid A by mild acid hydrolysis and purified by GPC. Methylation analysis and H-1 and C-13 NMR spectro scopic studies of the O-deacetylated polysaccharide allowed the determ ination of the structure of the pentasaccharide repeating unit of the polysaccharide which can be written as [GRAPHICS] The position of the O-acetyl groups was not determined.