However, down the line, somewhere down that pathway of that reaction, what will happen is that suicide inhibitor will produce a reactive intermediate that will modify the active side in some covalent way. And once that modification takes place, that inhibits that enzyme irreversibly. And so two examples that we commonly use in medicine of suicide inhibitors is penicillin and aspirin. So remember, in our discussion on Irreversible inhibitors, we said that penicillin is essentially an antibiotic. And this penicillin molecule binds into the active side of a specific type of enzyme used by bacterial cells to build bacterial cell walls. And this enzyme is known as transpeptidase.