Ligand (biochemistry) - Wikipedia
https://en.m.wikipedia.org/wiki/Ligand_(biochemistry)
In biochemistry and pharmacology, a ligand is a substance that forms a complex with a biomolecule to serve a biological purpose. The etymology stems from Latin ligare, which means 'to bind'. In protein-ligand binding, the ligand is usually a molecule which produces a signal by binding to a site on a target protein. The binding typically results in a change of conformational isomerism(conformation) of the target protein. In DNA-ligand binding stud…
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