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ligand
ligand A ligand is a molecule that attaches to another molecule, often a smaller one binding specifically to a larger target such as a receptor, antibody, or enzyme.
A ligand is a molecule that attaches to another molecule, often a smaller one binding specifically to a larger target such as a receptor, antibody, or enzyme. The term can also refer to a molecule that donates or accepts an electron pair to bond with a central metal atom in a coordination complex.