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活性位点
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'''活性位点'''（），又称'''[[活化]]位置'''，是指一个[[酵素]]中具有[[催化]]能力与结合位置的部位。其结构与化学性质可供辨识受质，并与受质结合。活化位置通是酵素表面上一个类似口袋的区域，内部含有可与特定受质发生反应的[[残基]]。
抑制剂会阻扰受质和酵素的交互作用，进而降低反应速率。抑制剂有几种不同的种类，分别有可逆和不可逆、竞争和非竞争；竞争型，一种和受质很像的物质，会和受质竞争酵素；非竞争型，一种会结合在非活性位点的物质，会影响受质和酵素的结合率。
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