The specific capsular polysaccharide of Streptococcus pneumoniae type 15A (American type 30)

Abstract
The specific capsular polysaccharide of S. pneumoniae type 15A (American type 30) is composed of D-galactose (3 parts), D-glucose (1 part), 2-acetamido-2-deoxy-D-glucose (1 part), phosphate (1 part) and glycerol (1 part). Hydrolysis, periodate oxidation methylation, optical rotation and NMR studies showed that the polysaccharide is a high MW linear polymer of a pentasaccharide repeating unit.