So the active side is much smaller than the actual size of the enzyme. So the remaining portion of the enzyme acts to create, stabilize and support the active side by bringing the residues that are far apart closer together to basically catalyze the reaction and bind the substrate. Now, in addition, we can have other sites on the enzyme outside of the active side that also play an important role in actually regulating the functionality of that particular enzyme. And these other sites are known as allosteric sites. And we'll see many examples in the next several lectures or in future lectures. Now, on top of that, these other portions of the enzyme can also interact with different types of components found in the cell.