Structure of the O‐specific polysaccharide containing pentitol phosphate, isolated from Hafnia alvei strain PCM 1191 lipopolysaccharide

The O‐specific polyaccharide of the lipopolysaccharide produced by Hafnia alvei strain PCM 1191 was shown by composition and methylation anlyses, periodate oxidation and one‐ and two‐dimensional 1H‐ and 31P‐NMR spectroscopy to be a polymer of a branched hexasaccharide repeating units having the structure: where lAraol =l‐arabitol The polysaccharide of 1191 strain has teichoic‐acid‐like character. Its peculiar feature is the presence of arabitol phosphate, a component observed for the first time in bacterial lipopolysaccharides.