Definition: Antithrombin is a protein that plays a crucial role in regulating the blood clotting process. It consists of two parts: the active thrombin and the inactive inhibitor. Antithrombin helps to prevent the formation of clots by binding to thrombin, which then causes it to stop. This prevents the release of thrombin from the liver, which is necessary for platelet aggregation and bleeding. In addition, antithrombin also helps to prevent the formation of fibrin, a
antithermin