The blood coagulation cascade. Each protein circulates in the blood in an active form.

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prothrombin  (Encyclopædia Britannica)

glycoprotein (carbohydrate-protein compound) occurring in blood plasma and an essential component of the blood-clotting mechanism. Prothrombin is transformed into thrombin by a clotting factor known as factor X or prothrombinase; thrombin then acts to transform fibrinogen, also present in plasma, ...

The blood coagulation cascade. Each protein circulates in the blood in an active form.

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Related Articles:

prothrombin  (Encyclopædia Britannica)

glycoprotein (carbohydrate-protein compound) occurring in blood plasma and an essential component of the blood-clotting mechanism. Prothrombin is transformed into thrombin by a clotting factor known as factor X or prothrombinase; thrombin then acts to transform fibrinogen, also present in plasma, ...

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