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81631731金蟲 (小有名氣)
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[求助]
熒光增強(qiáng)的結(jié)合常數(shù)公式
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看很多計(jì)算結(jié)合常數(shù)的都是:通過熒光粗滅劑對(duì)生物大分子(或者生物大分子藥物組分)的熒光強(qiáng)度的影響,運(yùn)用stern-volmer,scatchard,以及其變形公式計(jì)算的猝滅常數(shù)或結(jié)合常數(shù),F(xiàn)在想找一種或幾種公式,其中反應(yīng)的是:體系熒光強(qiáng)度隨加入的生物大分子的濃度的增加而增強(qiáng),計(jì)算藥物-生物大分子體系的結(jié)合常數(shù)。 期待各位高人的指點(diǎn)。! |

金蟲 (小有名氣)

專家顧問 (著名寫手)
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專家經(jīng)驗(yàn): +19 |
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(F-F0)=(F-Fmax)/[1+(KD/[protein])^n] Here, F and F0 are the fluorescence intensities of the drugs in the presence and absence of protein, respectively, Fmax is the maximum fluorescence intensity of protein-drug complex, KD is the equilibrium dissociation coefficient that quantifies the strength of the protein-drug interaction, and n is the Hill coefficient, which is generally regarded as a measure of the association cooperativity. Plot F versus [protein], and fit the plots with the above function. Then you will get the value of KD, n and Fmax. The binding constant is actually the reciprocal of KD. ref: J. Chem. Soc., Faraday Trans. 1998, 94, 2083-2087 Nat. Nanotechnol. 2009, 4, 577-580 |
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