食品科学 ›› 2008, Vol. 29 ›› Issue (12): 473-476.

• 生物工程 • 上一篇    下一篇

桑叶多酚氧化酶分离及活性研究

 黄涛, 杨洋, 聂静然, 梁锦添   

  1. 广西大学轻工与食品工程学院; 广西大学生命科学与技术学院;
  • 出版日期:2008-12-15 发布日期:2011-12-08

Study on Isolation and Activity of Polyphenol Oxidase(PPO) from Mulberry Leaves

 HUANG  Tao, YANG  Yang, NIE  Jing-Ran, LIANG  Jin-Tian   

  1. 1.College of Light Industry and Food Engineering,Guangxi University,Nanning 530004,China; 2. College of Life Science and Technology,Guangxi University,Nanning 530004,China
  • Online:2008-12-15 Published:2011-12-08

摘要: 采用分光光度法和扫描电子显微镜对桑叶多酚氧化酶(PPO)的结构、活性以及不同抑制剂的抑制效果进行研究。结果表明:桑叶多酚氧化酶为纤维状蛋白;其最适pH值为7.0,最适温度为40℃;在相同抑制剂浓度下,总体抑制效果为:抗坏血酸>亚硫酸氢钠>柠檬酸>氯化镁>氯化钠。

关键词: 桑叶, 多酚氧化酶, 纯化, 活性

Abstract: The characteristics of polyphenol oxidase(PPO) extracted from mulberry leaves were studied with spectrophotometer method and scanning electron microscopy,and the inhibitory effects of different inhibitors on the activity of PPO were studied as well. The results showed that PPO are fibrous protein. Its optimum pH value and temperature are 7.0 and 40 ℃,respectively. At the same concentrations,the inhibitory effects of different inhibitors are ranked as follows:ascorbic acid>sodium hydrogen sulfite>citric acid>magnesium chloride>sodium chloride.

Key words: mulberry leaf, polyphenol oxidase, purification, activity