[Structure of the O-specific polysaccharide from Proteus mirabilis O30].

Based on acid hydrolysis, methylation, and one- and two-dimensional 1H- and 13C-NMR spectroscopy, including homonuclear and 1H, 13C heteronuclear correlation spectroscopy (COSY) and rotating-frame nuclear Overhauser effect spectroscopy (ROESY); it was found that the O-specific polysaccharide chain of the lipopolysaccharide of the bacterium Proteus mirabilis O30 is a hexosamino-glucuronan built up of tetrasaccharide repeating units having the following structure: [formula: see text] The degree of O-acetylation of 2-acetamido-2-deoxyglucose is about 70%.