竞争性抑制作用（competitive inhibition）指的是有些抑制剂和酶底物结构相似，可与底物竞争酶活性中心，从而抑制酶和底物结合成中间产物。
用L—酪氨酸作底物，测定了银杏叶提取物对酪氨酸酶的非竞争性抑制作用。
The noncompetitive inhibition of EGb on tyrosinase was determined with L-Tryosine substrate.
AG 1112对重组人ck2的动力学研究表明：它与GTP和酪蛋白分别呈混合性和非竞争性抑制作用。
Kinetic studies of AG1112 on recombinant human CK2 showed that the inhibition was mixed (competitive is dominant) with GTP and noncompetitive with casein.
AG114对重组人ck2的动力学研究表明：它与GTP呈混合竞争性抑制作用，与酪蛋白呈非竞争性抑制作用。
Kinetic studies of AG114 inhibition on recombinant human CK2 showed that the inhibition was mixed competitive with GTP and noncompetitive with casein.
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