Proteins and Enzymes

ID #1613

Is it true that if an enzyme accepts a reactive group from a substrate then it must donate that group to help form that particular product from the given enzyme-substrate or it will donate that reactive group to a totally different substrate in another reaction?

Remember that an enzyme is specific for a particular reaction. All of the substrates that the enzyme is capable of donating to or accepting from are part of the overall reaction. But also keep two things in mind. The first is that not all overall reactions are as simple as A getting converted into B. And secondly, we'll encounter molecules this semester called "coenzymes" or "cofactors." These are associated molecules which serve to help different enzymes in a variety of different reactions. So enzymes can sometimes transfer chemical groups to the coenzymes or cofactors.

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