麦麸中多酚氧化酶的分离纯化及其性质的初步研究

被引:6
作者
赵志安
李万水
彭金荣
顾其敏
机构
[1] 复旦大学生物化学系
关键词
酶,小麦,提纯,特性; 麦麸,多酚氧化酶;
D O I
10.15943/j.cnki.fdxb-jns.1990.03.012
中图分类号
学科分类号
摘要
通过硫酸铵分级沉淀、DEAE-纤维素层析和Sephadex G200层析等方法,从小麦麸皮中分离并纯化了多酚氧化酶。该酶在60℃保温1h仍有44%的活性,最适反应pH为5.6。该酶可作用于多巴胺、多巴及邻苯二酚,但对绿原酸和酪氨酸没有作用。在以多巴胺为底物时,该酶的Km为5.0 mmol/L。低浓度的亚硫酸氢钠、L-抗坏血酸和苯基硫脲对该酶均有抑活作用。
引用
收藏
页码:320 / 326
页数:7
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