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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク binding constant ： ウィキペディア英語版 binding constant The binding constant is a special case of the equilibrium constant $K$. It is associated with the binding and unbinding reaction of receptor (R) and ligand (L) molecules, which is formalized as: :$+\; \backslash rightleftharpoons$. The reaction is characterized by the on-rate constant $k\_$ and the off-rate constant $k\_$, which have units of 1/(concentration time) and 1/time, respectively. In equilibrium, the forward binding transition $+\; \backslash to$ should be balanced by the backward unbinding transition $\backslash to\; +$. That is, :, An often considered quantity is the dissociation constant $K\_\; \backslash equiv\; 1/K\_$, which has the unit of concentration, despite the fact that strictly speaking, all association constants are unitless values. The inclusion of units arises from the simplification that such constants are calculated solely from concentrations, which is not the case. Once chemical activity is factored into the correct form of the equation, a dimensionless value is obtained. For the binding of receptor and ligand molecules in solution, the molar Gibbs free energy $\backslash Delta\; G$, or the binding affinity is related to the dissociation constant $K\_$ via $\backslash Delta\; G\; =\; R\; T\backslash ln\}$, in which $R$ is the ideal gas constant, $T$ temperature and the standard reference concentration $c^$ = 1 mol / L. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「binding constant」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.