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nouna protein in blood plasma that is the inactive precursor of thrombin
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Definition that contains prothrombin
- thromboplastin an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot
- prothrombinase coagulation factor that is converted to an enzyme that converts prothrombin to thrombin in a reaction that depends on calcium ions and other coagulation factors
- factor iii an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot
- factor x coagulation factor that is converted to an enzyme that converts prothrombin to thrombin in a reaction that depends on calcium ions and other coagulation factors
- thrombokinase an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot
- hypothrombinemia a low level of prothrombin (factor II) in the circulating blood; results in long clotting time and poor clot formation and sometimes excessive bleeding; can result from vitamin K deficiency