Factor XI

Blood Coagulation Factor XI; Antecedent, Plasma Thromboplastin; Factor XI, Coagulation; Thromboplastin Antecedent, Plasma; XI, Coagulation Factor
Stable blood coagulation factor involved in the intrinsic pathway. The activated form XIa activates factor IX to IXa. Deficiency of factor XI is often called hemophilia C.