Rodriguez ML, Jann B, Jann K Structure and serological properties of the capsular K11 antigen of Escherichia coli O13:K11:H11 Carbohydrate Research196 (1990)
101-109
/Variants 0/-b-D-Fruf-(2-2)-+
|
-3)-a-D-Galp4Ac-(1-P-
/Variants 0/ is:
Pr-?)-
OR (exclusively)
Ac-?)-
The capsular K11 antigen of Escherichia coli contains glucose, fructose, and phosphate in the molar ratios 2:1:1, and a backbone of -4)-β-D-glucopyranosyl-(1→4)-α-D-glucopyranosyl phosphate-(1→ to which β-D-fructofuranose is linked at position 3 of the β-D-glucopyranosyl residue. The fructose, which is the immunodominant sugar of the K11 antigen, is released from the polysaccharide under mild acidic conditions (70 degrees, pH 5.0).
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