And certain types of molecules or ions known as effector ions can bind to the allosteric sites of enzymes and either activate the activity of enzymes or deactivate inhibit the activity of our enzymes. And this method of regulation of enzymes is known as allosteric regulation. Now, the method by which allosteric regulation actually takes place is usually the feedback mechanism method. Now, to see what this mechanism actually involves, let's take a look at the following hypothetical series of enzymatic reaction. So let's suppose we want to convert A into D. And the way that we basically convert A into D is by following these series of steps. So enzyme one takes our molecule A and transforms it into intermediate B.