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Structure of the K74 antigen from Escherichia coli O44:K74:H18, a capsular polysaccharide containing furanosidic β-KDO residues

✍ Scribed by Ralph Ahrens; Barbara Jann; Klaus Jann; Helmut Brade

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 615 KB
Volume: 179
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(88)84120-x

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✦ Synopsis

The structure of the capsular K74 antigen of E. coli H702c (044:K74:H18) was elucidated by determination of the composition, 'H-and r3C-n.m.r. and c.d. spectroscopy, periodate oxidation, and methylation analysis of the polysaccharide and of a trisaccharide obtained by mild acid hydrolysis. The K74 antigen has the repeating unit --+3)-P-D-Ribf-( I--+2)-P-o-Ribf-( l-+6)-&KDOf-(2--+. Of the repeating units, -65% are O-acetylated, most probably at C-2 of the 3-linked ribose.

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