A protein that is present in blood and which is converted into fibrin during the blood clotting process.
The soluble protein in the blood which is the precursor of FIBRIN, the substance in blood clot.
n. a substance (*coagulation factor), present in blood plasma, that is acted upon by the enzyme thrombin to produce the insoluble protein fibrin in the final stage of *blood coagulation. The normal level of fibrinogen in plasma is 2–4 g/1 (4–6 g/l during pregnancy).
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