An enzyme liberated from damaged tissue and blood platelets; it converts prothrombin to thrombin in the coagulation of blood.
Substance called Factor X in blood that accelerates clotting.
An enzyme which converts prothrombin into thrombin, so starting the sequence for coagulation of blood.
Obsolete term for the 10th blood coagulation factor (factor X) or Stuart factor.
A substance that can convert thrombinogen to thrombin, playing a role in the blood clotting process.