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unknown
有机溶剂对菜青虫多酚氧化酶活力的影响
Authors
柯莉娜
王勤
+3 more
罗万春
薛超彬
陈清西
Publication date
30 December 2004
Publisher
Abstract
以菜青虫五龄虫为材料,分离提取多酚氧化酶,研究有机溶剂乙醇、正丙醇、乙二醇、丙二醇、丙三醇等对该酶催化L 多巴(L DOPA)氧化活力的影响.测定抑制作用的IC50分别为12.4、6.4、24.2、15.5和17.0%.抑制剂作用的动力学研究结果表明:乙醇、乙二醇和丙三醇对酶的抑制作用表现为非竞争性类型,其抑制常数KI分别为12.05、23.50和17.53mmol/L;正丙醇和丙二醇对酶的作用表现为混合型抑制,抑制常数KI分别为4.18和12.79mmol/L,KIS分别为19.45和22.41mmol/L
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Last time updated on 16/06/2016