The O-specific polysaccharide was isolated from the lipopolysaccharide of a marine bacterium Oceanisphaeralitoralis KMM 3654(T) and studied by chemical methods along with (1)H and (13)C NMR spectroscopy. The following new structure of the O-specific polysaccharide of O. litoralis containing D-glucose and two residues of 2-acetamido-2-deoxy-D-mannuronic acid was established: →4)-α-D-Glcp-(1→4)-β-D-ManpNAcA-(1→4)-β-D-ManpNAcA-(1→.
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