<unk>  is a protein involved in the clotting of blood. It is a<unk> lar protein that is polymerised to form a "mesh" that forms a hemostatic plug or clot (in conjunction with platelets) over a wound site.<unk>  is made from its zymogen<unk> ogen, a soluble plasma glycoprotein that is synthesised by the liver. Processes in the coagulation cascade activate the zymogen prothrombin to the serine protease thrombin, which is responsible for converting<unk> ogen into<unk> .<unk>  is then cross linked by factor XIII to form a clot.
Fibrin
Plasminogen
Antithrombin III
Fibrous protein
Coagulation factor VIIa
Thromboxane
Antihemophilic Factor 
Coagulation factor IX