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半抑制濃度
鎖定
- 中文名
- 半抑制濃度
- 外文名
- IC50
- 別 名
- 半抑制率
- 領 域
- 科學研究
半抑制濃度簡介
半抑制濃度(或稱半抑制率),即IC50。在間接競爭ELISA標準曲線中是一個非常重要的數據,標準曲線是一個S型曲線。
ICELISA中,不添加抑制物質的對照孔的OD值為B0,添加了抑制物質的孔的OD值為B,B/B0稱為結合率,在結合率為50%時所對應的抑制物質的濃度稱為IC50。一般IC50的數值越小,説明抗體的特異性能越強。
IC50為50%抑制濃度即B/B0=50%時所對應的濃度,半數抑制是用來衡量抗體靈敏度的半數抑制越低,説明抗體的靈敏度越高。
檢測下限(LOD)對應的OD值:OD(LOD)=B0-3SD
半抑制濃度定義
IC50,the half maximal inhibitory concentration,represents the concentration of an inhibitor that is required for 50% inhibition of things like an enzyme,a cell,a cell receptor or a microorganism.
It's commonly used as a measure of drug effectiveness. Another measure of drug efficacy is EC50 which represents the concentration of a compound that is required to obtain 50% of the maximum effect. Ex. EC100 would be the minimum concentration of a compound to obtain 100% of its effect.