A

David

Darling

fibrinogen

fibrinogen

Fibrinogen is a soluble protein, a coagulation factor, synthesized by the liver and released into the bloodstream. It is converted to fibrin (an insoluble protein) by thrombin (an enzyme) in the final stage of the blood clotting process. The normal level of fibrinogen in the blood plasma 2–4 g/l (4–6 g/l during pregnancy).