Grue M R, Parolis H, Parolis L A
School of Pharmaceutical Sciences, Rhodes University, Grahamstown, South Africa.
Carbohydr Res. 1994 Sep 15;262(2):311-22. doi: 10.1016/0008-6215(94)84187-x.
NMR spectroscopy was performed on the depyruvated capsular antigen of E. coli K103 and on the oligosaccharide obtained by depolymerisation of the native polysaccharide with a viral-borne endoglycanase. This capsular polysaccharide is the only one to be co-expressed with O group 101 and joins a small group of unusual capsular polysaccharides which possess pyruvic acid as the only acidic function. The primary structure was shown to be composed of the repeating unit: [formula: see text]
对大肠杆菌K103的去丙酮酸荚膜抗原以及通过病毒携带的内切聚糖酶对天然多糖进行解聚得到的寡糖进行了核磁共振光谱分析。这种荚膜多糖是唯一与O101群共同表达的多糖，并且属于一小类不寻常的荚膜多糖，这些多糖仅以丙酮酸作为酸性官能团。其一级结构显示由重复单元组成：[化学式：见原文]
