So now let's take a look at another important molecule that acts as an irreversible inhibitor to thrombin. And this is antithrombin three. So antithrombin three is a glycoprotein whose structure actually resembles the structure of an inhibitor we spoke about previously, alpha one antitrypsin. So if you remember, alpha one antitrypsin is that irreversible inhibitor that inhibits elastase as well as trypsin. Well, in the same exact way, antithrombin three basically binds to the acticide and inhibits the activity of thrombin. And by inhibiting thrombin, we basically inhibit the final common pathway and we inhibit the formation of blood clots.