The primary structure of the acidic capsular antigen of Escherichia co
li O8:K25:H9 was shown by monosaccharide analysis, methylation analysi
s, and by 1D and 2D H-1 and C-13 NMR spectroscopy to be composed of Li
near tetrasaccharide repeating units having the structure: --> 2)-beta
-D-GlcpA-(1 --> 3)-alpha-D-GalpNAc-(1 --> 3)-alpha-D-GalpNAc-(1 --> 2)
-alpha-D-Fucp-(1 -->