So this is a very important property of enzymes because that means a very small quantity of enzymes can be used to basically speed up many reactions at the same exact time. We do not have to actually use up our enzyme and create new enzymes because one enzyme can basically react with many different reactants. So that is expressed in the following expression. So let's suppose we have reactants A and B. We place our enzyme, that enzyme basically takes A and B and reacts them. It decreases the activation energy to form product C and D. But the actual enzyme on the product side is exactly the same as the enzyme on the reactant side.