食品科学 ›› 2003, Vol. 24 ›› Issue (9): 26-32.

• 基础研究 • 上一篇    下一篇

枸杞子阿拉伯半乳糖聚糖糖蛋白的微细构造研究(Ⅱ)

 秦小明, 宁恩创, 林华娟   

  1. 广西大学生物技术与糖业工程学院,日本歧阜大学联合农学研究科
  • 出版日期:2003-09-15 发布日期:2011-12-13

Micro Structure of Arabinogalactan-protein from the Fruit of Lycium Chinense Mill(Ⅱ)

 QIN  Xiao-Ming, NING  EN Chuang, LIN  Hua-Juan   

  • Online:2003-09-15 Published:2011-12-13

摘要: 按照Taylor法(还原剂为NaBD4)将从枸杞子中分离出来的阿拉伯半乳糖聚糖糖蛋白Cp-2-B中含有的半乳糖醛酸还原成重氢标记的半乳糖,对还原前后的样品进行甲基化处理后供GC-MS。 结果发现Cp-2-B分子中存在着非还原末端,(1→3)- 结合以及(1→4)- 结合等3种半乳糖醛酸残基。核磁共振分析也证实了这一结论。另外,从Cp-2-B与果胶粗酶以及果胶内切酶的反应结果可以推测出,半乳糖醛酸残基以分散状态或者短链形式存在,分子中不存在类似果胶物质那样的、由连续的(1→4)结合的半乳糖醛酸组成的Smooth领域。

关键词: 枸杞子, 阿拉伯半乳聚糖糖蛋白(AGP), 微细构造

Abstract: The Galacturonic acid residues in Cp-2-B were reduced by Taylor method to be Galactosyl residues using deuteriumindexed reducing reagent NaBD4, and then subjected to methylation treatment and assayed by GC-MS. The results suggested thatthey contained non-reducing terminal, 3-O- and 4-O-substituted galacturonic acid residues, indicating the presence of three kindsof galacturonic acid residues in Cp-2-B. NMR analysis was also supported this conclusion. Additionally, The actions to thecrude pectinase and endopolygalacturonase suggested that Cp-2-B had no consecutive region of (1→4) linkage Galacturonicacid residues.

Key words: Lycium chinense Mill, arabinogalactan-protein(AGP), micro structure