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  • Title: Composition of the lipopolysaccharide from different capsular serotype strains of Haemophilus influenzae.
    Author: Zamze SE, Moxon ER.
    Journal: J Gen Microbiol; 1987 Jun; 133(6):1443-51. PubMed ID: 3499480.
    Abstract:
    Lipopolysaccharide (LPS) from all six serotype strains of Haemophilus influenzae was similar in composition. The oligosaccharide, of each LPS, was composed of glucose, galactose, heptose and 2-keto-3-deoxyoctonic acid. The lipid A was composed of glucosamine, phosphate and the fatty acids 14:0 and 3-OH 14:0. Each LPS also contained ethanolamine and ethanolamine phosphate, and the oligosaccharides from two strains additionally contained small amounts of glucosamine. Although the LPS was similar in composition, different serotypes had quantitative differences, especially in the galactose content, which correlated with the antigenic specificity of their homologous antisera and with their mobility on SDS-polyacrylamide gel electrophoresis (SDS-PAGE). A survey by SDS-PAGE showed that LPS from strains of the serotypes a, c and d was characteristically of lower Mr than the LPS from most (80%) serotype b strains.
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