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4-氨基苯甲酸对蘑菇酪氨酸酶的抑制作用机理研究
Authors
刘凤娇
周晶晶
+5 more
庄江兴
李智聪
杨美花
邱凌
陈清西
Publication date
15 March 2009
Publisher
Abstract
报道了4-氨基苯甲酸(4-aminobenzoic acid)对蘑菇酪氨酸酶单酚酶和二酚酶活力的影响和抑制效应.结果表明,4-氨基苯甲酸对蘑菇酪氨酸酶的单酚酶和二酚酶活性均有抑制作用.导致单酚酶活力和二酚酶活力下降50%的抑制剂浓度(IC50)分别为0.35和0.30 mmol/L.4-氨基苯甲酸对单酚酶的迟滞时间有明显的延长效应,1.0 mmol/L可使单酚酶的迟滞时间从30.5 s延长到155.1 s,增加了4.4倍.4-氨基苯甲酸对二酚酶的抑制作用表现为混合型可逆抑制作用,抑制常数(KI和KIS)分别为0.259和1.46 mmol/L
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Last time updated on 16/06/2016