The structure of the capsular polysaccharide (S5) elaborated by Streptococcus pneumoniae type 5 has been investigated by using n.m.r. spectroscopy, methylation analysis, and various specific degradations. It is concluded that the polysaccharide is composed of pentasaccharide repeating-units having t
Structural studies on the polysaccharide from Streptococcus pneumoniae type 20
β Scribed by Abhijit Roy; Nirmolendu Roy
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 87 KB
- Volume
- 128
- Category
- Article
- ISSN
- 0008-6215
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β¦ Synopsis
It was of interest to study the pneumococcal polysaccharides containing D-galactofuranosyl residues, because, in most cases, such residues have been found to be immunodeterminant'. By trial experiments, it was found that the polysaccharide from Streptococcus pneumoniae type 20 (S-20) contains D-galactofuranosyl UnitS.
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The structure of the capsular polysaccharide from Streptococcus pneumoniae type 2 has been reinvestigated, specific degradations and n.m.r. spectroscopy being the main methods used. It is concluded that the polysaccharide is composed of hexasaccharide repeating-units having the following structure,
The capsular polysaccharide from Streptococcus pneumoniae Type 23 (S-23) was found to contain D-galactose, D-glucose, L-rhamnose, glycerol, and phosphorus in the ratios of 1: 1: 2:0.6: 1. Methylation analysis provided information about the linkages of the different sugar units. The sequence of the d
The structures of the capsular polysaccharides (S-15B and S-15C) from Streptococcus pneumoniae types 15B and 15C have been investigated by using n.m.r. spectroscopy, methylation analysis, and various specific degradations. It is concluded that the polysaccharides are composed of pentasaccharide repe