And two examples of groups of enzymes which utilize this type of regulation method are digestive enzymes such as chimitrypsin trypsin, as well as pepsin, as well as all the different types of enzymes involved in a blood clotting cascade. And we'll discuss this in detail in future electra. So we have the zymogen that the cell produces, that's the inactive enzyme, the pro enzyme and then some type of protease cleaves the zymogen at some specific location. Let's suppose at this position here. And that creates the active form of the enzyme. So this piece is the active form and then this itself can be inhibited by using some type of irreversible inhibitor that binds onto some side found on that active form and that inhibits the activity of that enzyme.