食品科学 ›› 2002, Vol. 23 ›› Issue (6): 44-48.

• 基础研究 • 上一篇    下一篇

枸杞多糖LBP2a的分离、纯化与结构特征

 王建华, 汪建民, 李林, 张民, 张声华   

  1. 山东农业大学农学院,武汉市卫生防疫站,华中农业大学食品科技系
  • 出版日期:2002-06-15 发布日期:2012-02-13

Study on Purification and Structura l Characteristics of Polysaccharid e LBP2a from Fructus Lycii

 WANG  Jian-Hua, WANG  Jian-Min, LI  Lin, ZHANG  Min, ZHANG  Sheng-Hua   

  • Online:2002-06-15 Published:2012-02-13

摘要: 经提取、分离和纯化等一系列步骤得到枸杞多糖LBP2a,用SephadexG-200柱层析和SDS-不连续体系凝胶电泳法鉴定,LBP2a为分子量均一性组分,其分子量为77482。经分光光度法测得中性糖含69.3%、半乳糖醛酸含23.8%、蛋白质含5.3%,GC-MS法测定中性糖为鼠李糖:木糖:阿拉伯糖:甘露糖:葡萄糖:半乳糖(2.62:42.85:2.13:1.00:4.36:22.80)。红外光谱分析表明LBP2a有β异头碳糖基,β-消除反应前后紫外(240nm)吸收变化及氨基酸含量变化表明LBP2a中糖链和氨基酸间有Glycan-O-Ser连接方式。

关键词: 枸杞子, 枸杞多糖, 纯化, 结构

Abstract: LBP2a,one component ofLyciumbarbarumpolysaccharides(LBP),was obtainedfromFructuslycii by a series of steps of extraction,separation,and purification.LBP2a was o f homogeneous molecular weight assa yed by SDS -gel electrophoresis and longer Sephadex G -200column chromatograp hy.Its molecular weight was 77482as-sayed by SDS -gel electrophoresis.I t contained neutral sugar(69.3%),galacturnic acid(23.8%),and protein(5.3%).Monosaccharide residues identifi ed by GC -MS were rhamnose:xylose:arabinose:mannose:glucose:galactose(2.62:42.85:2.13:1.00:4.36:22.80).There wereβ-glycoside linkages as shown by FT -I Rspec-trum.Linkages betweensugars andam inoacids wereglycan -O -Seraccordi ngtobothits UVabsorptionchangeat240nmafterβ-eliminationreactions andits amin o acidcontentchange after the treatmentof0.2mol /LNaOH +1mol /L NaBH 4 .

Key words: Fructus lycii , Lyciumbarbarum polysaccharide(LBP), Purification , Structure