食品科学 ›› 2002, Vol. 23 ›› Issue (1): 26-30.

• 基础研究 • 上一篇    下一篇

茶多酚——蛋白质之间的络合及沉淀回收研究

 黄惠华, 王少斌, 王志, 梁汉华   

  1. 华南理工大学食品与生物工程学院,香港理工大学应用生物与化学技术系
  • 出版日期:2002-01-15 发布日期:2012-02-13

Study on Inter-complexes and Sediments between Tea Polyphenols and Different Protein Recoveries

 HUANG  Hui-Hua, WANG  Shao-Bin, WANG  Zhi, LIANG  Han-Hua   

  • Online:2002-01-15 Published:2012-02-13

摘要: 从绿茶中提取了含有5种儿茶素单体的茶多酚,对菠萝蛋白酶、大豆分离蛋白、酪蛋白、细胞色素C、胰蛋白酶、淀粉酶以及木瓜蛋白酶等蛋白质进行络合、沉淀及回收。茶多酚和这些蛋白质表现出混活性。在特定的蛋白质浓度下,茶多酚与各种蛋白质络合时的起混浓度分别是:猪胰蛋白酶为0.5%;大豆分离蛋白、木瓜蛋白酶及α-淀粉酶为0.1%,菠萝蛋白酶为0.3%;细胞色素C为0.4%。用0.7%的茶多酚对菠萝蛋白酶的蛋白质最大回收率为60%,而对木瓜蛋白酶活性的最大回收率可达78%;0.5%的茶多酚对胰蛋白酶及酪蛋白的最大回收率分别为8%和7%左右。0.8%的茶多酚对大豆分离蛋白、细胞色素C的最大回收率约20%左右。实验结果还表明,茶多酚对来自米曲霉的α-淀粉酶无抑制作用,通过0.3%的茶多酚浓度,可以获得约71%的α-淀粉酶活性最高回收率。

关键词: 茶多酚, 蛋白质, 络合, 起混

Abstract: Tea polyphenols composed of five individual catechins were abstracted from green tea and used to complex with papain,bromelain,trypsin,casein,cytochrome C,α-amylase and isolates of soy protein.It was found that tea polyphenols were haze-active when complexed with the proteins. By assaying complex as and sediments the maximum protein recoveries for bromelain,trypsin,casein,cytochrome C and isolates of soy protein were 60%,8%,7%,20%,20% at various tea polyphenols concentrations of 0.7%,0.5%,0.5%,0.8% and 0.8% respectively.Tea polyphenols showed no inhibition for the activity of α-amylse from Aspergillus Oryzae and the activity recoveries of α-amylase and papain reached 71% and 78% respectively at tea polyphenols concentrations of 0.3% and 0.7%.

Key words: Tea polyphenols , Proteins , Complex , Haze-active