PubMed:1964866 JSONTXT 24 Projects

Structure of the K24 antigen of E. coli O83:K24:H, a polymer that consists of alpha-Kdop and glycerol phosphate. The structure of the K24 antigen of Escherichia coli O83:K24:H31 was elucidated by determination of composition and by 1H-, 13C-, and 31P-n.m.r. spectroscopy of the polymer and of a Kdo-glycerol (Gro) glycoside, obtained by mild alkaline hydrolysis and subsequent incubation with alkaline phosphatase. The K24 antigen has the repeating unit----7)-alpha-Kdop-(2----1)-Gro-(3-P. In the polymer, 56% of the repeating units are O-acetylated at C-4 of Kdo, approximately 28% at C-5 of Kdo, and approximately 16% are not acetylated.