Abstract
The immunodominant part in the O-antigenic polysaccharide from Escherichia coli O128 was immunologically characterized by an enzyme-linked immunosorbent assay (ELISA). The antibody specificity was determined by the inhibitory effects of the methyl glycosides of constituent mono- and oligosaccharides synthesized related to the O-antigenic polysaccharide from E. coli O128. It was found that methyl alpha-L-fucopyranoside was the most effective inhibitor amongst the monosaccharides while the highest antibody specificity was directed towards the trisaccharide with the structure: beta-D-GalpNAc-(1-->6)-[alpha-L-Fucp-(1-->2)]-beta-D-Galp-1-->OMe suggesting that the monospecific antibody has the extended combining site.
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