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In biochemistry, affinity describes the strength of a non-covalent interaction between a biological macromolecule, nucleic acid or protein, and a ligand that binds to a site on its surface. It is measured quantitatively by means of the equilibrium constant association / dissociation, sometimes called constant affinity. This affinity is based on the nature, geometry and number of physical interactions between the ligand and its target (electrostatic interactions, hydrogen bonds, van der Waals interactions, etc.). The term affinity is also used to describe the binding of metal ions by chelating compounds. Related Articleschange the code
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