食品科学 ›› 2009, Vol. 30 ›› Issue (1): 25-27.doi: 10.7506/spkx1002-6630-200901004

• 基础研究 • 上一篇    下一篇

低分子量南瓜多糖LWPP-Ia的结构研究

张凡华,严 浪,张树明,石宝霞,李淑燕,李全宏*   

  1. 中国农业大学食品科学与营养工程学院
  • 收稿日期:2008-01-03 出版日期:2009-01-01 发布日期:2010-12-29
  • 通讯作者: 李全宏 E-mail:liquanhong66@163.com
  • 基金资助:

    国家自然科学基金项目(30671469)

Structure Elucidation of Low Molecular Weight Pumpkin Polysaccharide LWPP-Ia

ZHANG Fan-hua,YAN Lang,ZHANG Shu-ming,SHI Bao-xia,LI Shu-yan,LI Quan-hong*   

  1. (College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China )
  • Received:2008-01-03 Online:2009-01-01 Published:2010-12-29
  • Contact: LI Quan-hong E-mail:liquanhong66@163.com

摘要:

对从南瓜中提取出来的低分子量纯多糖LWPP-Ia,根据高碘酸氧化、Smith 降解、甲基化反应及GC、GC-MS 等方法,确证了其结构特征:由葡萄糖、果糖、半乳糖组成,摩尔比为3.6:1:1.2,为少分支结构,1,4- 键型为主要键型, 主链上的分支点为-1Glu2-,侧链末端主要由1 位连接Glu 和2 位连接Fru,-1Glu2- 构成侧链。

关键词: 南瓜, 多糖, 结构

Abstract:

By means of periodate oxidation , Smith degradation , methylation, GC, GC-MS, the structure of low molecular weight polysaccharide, LWPP-Ia isolated from pumpkin was analyzed. Monosaccharide composition analysis of LWPP-Ia indicated hat it is a low branched molecule composed of glucose, fructose and galactose in the molar ratio of 3.6:1:1.2. The main chain is made up of (1 → 4)-linked-Glu and (1 → 4)-linked-Gal1 Some of (1 → 4)-linked-Glus were substituted at 2-O. The (1 → 2)- linked Glu is on the position 1 of side chain and the branch end is (1→)-Glu and (2→)- Fru.

Key words: pumpkin, polysaccharide, structure

中图分类号: