Rao C V, Heidelberger M
J Exp Med. 1966 May 1;123(5):913-20. doi: 10.1084/jem.123.5.913.
The capsular polysaccharide of Type IX pneumococcus contains D-glucose, N-acetyl-D-glucosamine, and D-glucuronic acid. Complete hydrolysis is difficult. All of the N-acetylglucosamine is resistant to oxidation by periodate, but the other two sugars are degraded in part. Chemical and quantitative serological data are consistent with the linkage of two D-glucose residues 1 --> 4, as in maltose; others may be linked 1 --> 3. Part, at least, of the glucuronic acid and N-acetylglucosamine is linked to glucose.
IX型肺炎球菌的荚膜多糖含有D-葡萄糖、N-乙酰-D-葡萄糖胺和D-葡萄糖醛酸。完全水解很困难。所有的N-乙酰葡萄糖胺都抗高碘酸盐氧化,但其他两种糖部分降解。化学和定量血清学数据与两个D-葡萄糖残基以1→4相连一致,如同麦芽糖;其他的可能以1→3相连。至少部分葡萄糖醛酸和N-乙酰葡萄糖胺与葡萄糖相连。