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来自维基百科,自由的百科全书
竞争性拮抗剂(英语:Competitive antagonist)是一种受体拮抗剂键结到受体后但并不活化受体。拮抗剂会跟促效剂竞争同受体上的结合位点。强效的拮抗剂会将促效剂从结合位点取代出来,使受体的活化减低。
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竞争性拮抗剂的存在将使促效作用的剂量-反应曲线向右横移。[1]竞争性拮抗剂的Schild regression之斜率为1,且X、Y的截钜跟拮抗剂的解离常数相等。[1]
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