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81631731

金虫 (小有名气)

[求助] 荧光增强的结合常数公式

看很多计算结合常数的都是:通过荧光粗灭剂对生物大分子(或者生物大分子药物组分)的荧光强度的影响,运用stern-volmer,scatchard,以及其变形公式计算的猝灭常数或结合常数。现在想找一种或几种公式,其中反应的是:体系荧光强度随加入的生物大分子的浓度的增加而增强,计算药物-生物大分子体系的结合常数。
期待各位高人的指点!!!
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lao7

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3楼: Originally posted by sally208 at 2011-07-16 15:06:32
(F-F0)=(F-Fmax)/

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 compl ...

没眼看明白,原参考文献中没有该公式的解释。
而且,作者提到:Plot F versus [protein], and fit the plots with the above function. Then you will get the value of KD, n and Fmax.
难道F对 [protein]作图、拟合能获得上述函数的曲线?就能直接获得Kd,n和Fmax值?
5楼2019-12-24 13:59:27
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81631731

金虫 (小有名气)

没有人响应吗???
要有梦想,即使遥远~
2楼2011-07-15 08:37:10
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sally208

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【答案】应助回帖

★ ★ ★
opq691(金币+3): O(∩_∩)O谢谢 2011-07-17 00:03:51
81631731(金币+3): 非常感谢啊!~~~我要好好看看! 2011-07-17 11:40:28
81631731(金币+2): 虽然没有消息了,还是谢谢你。 2011-07-17 18:03:57
(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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3楼2011-07-16 15:06:32
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lao7

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引用回帖:
3楼: Originally posted by sally208 at 2011-07-16 15:06:32
(F-F0)=(F-Fmax)/

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 compl ...

楼主,[protein]指的是淬灭剂的浓度,还是指的是荧光剂的浓度?我看您参考为文献指的是蛋白质是猝灭剂,然而纳米颗粒物是荧光剂。请帮助澄清一下!
4楼2019-12-24 11:53:57
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