Now, why would an enzyme want to have these allosteric sites? Well, basically these allosteric sites is a method by which we can control or regulate them. Activity of our enzymes. 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.