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|Title:||Determination of the Modified “Affinity Index” of Small Ligands and Macromolecular Receptors from NMR Spin-lattice Relaxation Data||Authors:||Martini, S
|Issue Date:||2007||Project:||None||Journal:||CHEMICAL PHYSICS LETTERS||Abstract:||
In this Letter we propose a development of a NMR methodology to study ligand–macromolecular receptor interactions, based on the analysis of proton selective spin-lattice relaxation rate enhancements of the ligand, to calculate an aﬃnity index, related to strength of the interaction process. In this work we modiﬁed this index by normalization to the relaxation rate of the free ligand, in order to take into account the eﬀects of motional anisotropies and diﬀerent proton densities. This approach also allowed the calculation of the relaxation rate of the bound ligand as well as the equilibrium constant of the interaction process.
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