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产物及其类似物对锯缘青蟹NAGase酶活力的影响
Authors
张继平
杨学敏
+3 more
谢进金
陈清西
颜雅雯
Publication date
15 May 2006
Publisher
Abstract
以产物N-乙酰-β-D-氨基葡萄糖(NAG)及其类似物-葡萄糖(glu)、半乳糖(gal)、果糖(fru)和蔗糖(suc)为效应物,研究它们对锯缘青蟹N-乙酰-β-D-氨基葡萄糖苷酶(NAGase)活力的影响及抑制作用机理.结果表明,上述效应物对酶均表现为可逆的抑制作用.NAG有较强的抑制作用,其IC50为0.011 mol/dm3.但产物类似物对该酶的抑制作用均弱于NAG.NAG对该酶的抑制作用机理表现为反竞争性抑制,抑制常数KIS为4.37×10-3mol/dm3;glu、gal、suc则表现为非竞争性抑制,抑制常数KI分别为0.125、0.394、0.474 mol/dm3;而fru则表现为竞争性抑制,抑制常数KI为0.455mol/dm3
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Last time updated on 16/06/2016