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Position: Home > Articles > Study on Purification and Structura l Characteristics of Polysaccharid e LBP2a from Fructus Lycii FOOD SCIENCE 2002 (6) 44-48

枸杞多糖LBP2a的分离、纯化与结构特征

作  者:
王建华;汪建民;李林;张民;张声华
单  位:
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
关键词:
枸杞子;枸杞多糖;纯化;结构
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。
译  名:
Study on Purification and Structura l Characteristics of Polysaccharid e LBP2a from Fructus Lycii
作  者:
Wang Jianhua et al.
关键词:
Fructus lycii Lyciumbarbarum polysaccharide(LBP)Purification Structure
摘  要:
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 .

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