Structure of the O-polysaccharide of Escherichia coli O60
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Structure of the O-polysaccharide (O-antigen) of Escherichia coli O60 was studied by sugar analysis, partial solvolysis with CF3CO2H, and 1D and 2D 1H and 13C NMR spectroscopy. The O-polysaccharide was found to consist of D-galactose and L-rhamnose. The structure of its branched tetrasaccharide repeating unit was established, which is unique among known bacterial polysaccharide structures.
Key wordsEscherichia coli bacterial polysaccharide structure O-antigen lipopolysaccharide solvolysis
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