The type-specific substance, S. 33B, from Pneumococcus type 33B contains P, 2.89; hexose, 51; total sugar, 69; galactosamine, 18; and d-glucose, 20%. 2. After degradation with alkali, followed by enzymic dephosphorylation, S. 33B yielded a hexasaccharide. 3. The hexasaccharide was assigned the structure O-beta-d-glucopyranosyl- (1-->5)-O-beta-d-galactofuranosyl- (1-->3)-O-2-acetamido-2-deoxy-beta-d- galactopyranosyl-(1-->4)-O-[alpha-d- galactopyranosyl-(1-->2)]-alpha-d-galactopyranosyl- (1-->2)-ribitol. 4. Phosphate residues in S. 33B are located on the hydroxyl groups at position 5 of ribitol units and on the hydroxyl groups at position 6 of hexopyranose residues.
摘要
来自33B型肺炎球菌的型特异性物质S. 33B含有磷2.89%、己糖51%、总糖69%、半乳糖胺18%和d -葡萄糖20%。2. 用碱降解并经酶促去磷酸化后,S. 33B产生了一种六糖。3. 该六糖的结构被确定为O-β-d-吡喃葡萄糖基-(1→5)-O-β-d-呋喃半乳糖基-(1→3)-O-2-乙酰氨基-2-脱氧-β-d-吡喃半乳糖基-(1→4)-O-[α-d-吡喃半乳糖基-(1→2)]-α-d-吡喃半乳糖基-(1→2)-核糖醇。4. S. 33B中的磷酸残基位于核糖醇单元5位的羟基以及己吡喃糖残基6位的羟基上。