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MTT??????????????0-0.7????????????¦¶????????????

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Pn=0.06
P=0.95 0.80 0.65 0.43 0.21 0.06=3.1
Xm=lg0.1=-1
lgI=lg0.1/0.01=1
lgIC50=-1-1*(3.1-(3-0.95-0.06)/4)=-3.6025
IC50=0.00025

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Xm:lg ??????
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