Enzymes lower the activation energy necessary to transform a reactant into a product. On the left is a reaction that is not catalyzed by an enzyme (red), and on the right is one that is (green).

the activation energy is reduced. This makes more of the collisions successful at a given temperature. So a catalyst increases the rate of reaction by lowering the minimum energy required for ...

These mutations lowered activation energy, enhancing catalytic efficiency ... declining significantly at lower temperatures. In contrast, enzymes from mesophiles and psychrophiles, organisms ...