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ligand is a molecule or atom that binds to another molecule or atom, typically a larger one. It forms a complex by attaching itself to a receptor or metal ion. Think of it as a key that fits into a lock, where the lock is the receptor or metal ion and the key is the
ligand. Ligands play important roles in chemistry, biology, and drugs, as they can influence the behavior and function of the larger molecule they bind with.
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