The dissociation constant, K_D, is A) the rate at which a ligand binds its receptors. B) the rate at which a ligand unbinds from its receptors. C) a measure of the affinity of the receptor for its ligand. D) lower when receptor-ligand binding requires high ligand concentrations. E) a measure of the ligand concentration.

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The dissociation constant (KD) is a measure of the affinity of the receptor for its ligand. It is the concentration of the ligand at which half of the receptors are occupied. A lower KD indicates a higher affinity of the receptor for its ligand. The given compound's dissociation constant, K_D, is not a standard notation for KD, but it still refers to the dissociation constant of the receptor-ligand binding.

The Dissociation Constant, KD, Is

The Dissociation Constant, K_D, Is