in the clotting of blood, also known as: Stuart factor, Stuart-Prower factor, prothrombase, and prothrombinase. Its active form, factor Xa (EC 18.104.22.168), is formed from factor X by limited proteolysis and assists in the conversion of prothrombin to thrombin. A deficiency of factor X will lead to impaired blood coagulation.
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Examples: glitazone, GI cocktail, etc.