The structure of the capsular polysaccharide from Klebsiella type 52, using the computerised approach CASPER and NMR spectroscopy.

The structure of the capsular polysaccharide from Klebsiella type 52 has been elucidated using an improved and extended version of the computerised approach CASPER and NMR spectroscopy as principal methods. A previous suggestion to the structure but without the anomeric prefixes, could be shown correct [H. Björndal et al.

Structure of the capsular polysaccharide from the Klebsiella K8 reference strain 1015.

The structure of the capsular polysaccharide from the Klebsiella K8 reference strain 1015 has been elucidated. The structure was deduced from sugar analysis, different methylation analyses, a uronic acid degradation, and NMR spectroscopy. It is concluded that the polysaccharide is composed of pentasaccharide repeating units with the structure: [formula: see text] The structure differs from that of the previously published structure of the capsular polysaccharide from Klebsiella K8, which originates from another strain and has the following structure: [formula: see text] The serological similarity between the two strains is most likely derived from a common tetrasaccharide which is substituted in different ways in the two strains.

Structural studies of a teichoic acid from Streptococcus agalactiae type III.

An unusual type of teichoic acid has been isolated from Streptococcus agalactiae type III. It has the same backbone as the lipoteichoic acid from Streptococcus faecalis, but is devoid of fatty acid residues, a phosphatidyl group, and substituents in the poly(glycerol phosphate) side-chain. The following structure, with n approximately 20, was determined mainly with the aid of n.