食品科学 ›› 2004, Vol. 25 ›› Issue (3): 159-162.

• 营养卫生 • 上一篇    下一篇

龙须菜藻胆蛋白的分离及其清除自由基作用的初步研究

 陈美珍, 张永雨, 余杰, 谢雄彬   

  1. 汕头大学理学院生物系
  • 出版日期:2004-03-15 发布日期:2011-10-24

Studies on Separation and Scavenging Activities on Free Radicals of Phycobiliproteins from Gracilaria Lemaneiformis

 CHEN  Mei-Zhen, ZHANG  Yong-Yu, YU  Jie, XIE  Xiong-Bin   

  1. Department of Biology, Shantou University
  • Online:2004-03-15 Published:2011-10-24

摘要: 龙须菜藻体经细胞破碎,其水溶性提取物经硫酸铵沉淀即得藻胆蛋白粗提物。该粗提物经Sephadex G-100柱层析,可分离出藻红蛋白(PE),其在聚丙烯酰胺凝胶电泳中仅显示一条带,用SDS-PAGE不连续电泳测定其亚基分子量分别为18000Da和24000Da。该PE的吸收光谱有二峰一肩,最大吸收值在570nm处,属I型R-PE。分别采用Fenton体系和邻苯三酚-鲁米诺发光体系测定藻胆蛋白粗提物及分离的PE清除•OH和O2•能力,结果表明,藻胆蛋白粗提物和分离的PE均有清除自由基作用,但两者间存在差异。

关键词: 龙须菜, 藻胆蛋白, 分离, 吸收光谱, 自由基

Abstract: The crude phycobiliproteins were got from water extraction of smashed cells of Gracilaria lemaneiformis wereprecipitated in ammonium sulfate. Phycoerythrin could be separated through chromatographed the crude phycobiliproteins bySephadex G-100 column, and it appeared only one band in the polyacrlamide gel electrophoresis. Molecular weights of subunitsof the phycoerythrin are 18000Da and 24000Da that were measured by SDS-PAGE. The PE possessed an absorption maxi-mum at 570nm and it belongs to R-PE type Ⅰ.The scavenging activities of the crude phycobiliproteins and the PE on OH ofFenton reaction and O2• f Luminol reaction were studied.The results showed that the crude phycobiliproteins and the PE bothcould scavenge free radicals, but their abilities were different.

Key words: gracilaria lemaneiformis, phycobiliproteins, separation, absorption spectrum, free radical