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dissociation constant

(1) An equilibrium constant (Kd) for the dissociatIon of a complex of two or more biomolecules into its components; for example, dissociatIon of a substrate from an enzyme. (2) The dissociatIon constant of an acid (Ka); or base (Kb), describing its dissociatIon into its conjugate base and a proton; or conjugate acid and a hydroxide Ion.

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