Enzyme Kinetics The rate of unimolecular reaction is proportional to the concentration of the reactant.Thus rate is linearily dependent on [A]. A→P dA]=KIA] dt +[A] But if this reaction is catalyzed by an enzyme,the rate shows saturation behavior.Why? A Enzyme→P +[A]Enzyme Kinetics • The rate of unimolecular reaction is proportional to the concentration of the reactant. Thus rate is linearily dependent on [A]. • But if this reaction is catalyzed by an enzyme, the rate shows saturation behavior. Why? A→ P [ ] [ ] k A dt d A v = − = v [A] A P v ⎯Enzyme ⎯⎯→ [A]