The primary structure of the acidic capsular polysaccharide of Escheri
chia coli O8:K43:H11 was shown by monosaccharide analysis, methylation
analysis, beta-elimination, and by 1D and 2D H-1 and C-13 NMR spectro
scopy to be composed of branched pentasaccharide repeating units with
the structure [GRAPHICS] ]