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Homocysteine is an amino acid. Amino acids are the building blocks of proteins. When proteins break down, elevated levels of amino acids like homocysteine may be found in the bloodstream. Having elevated levels of homocysteine in the blood (hyperhomocysteinemia) is associated with atherosclerosis and blood clots. It is not possible to get homocysteine from the diet. It must be made from methionine, another amino acid that is found in meat, fish, and dairy products.
Posted on. (Answer #1). Fibrin is a protein substance that is synthesized by the liver and plays an essential role in blood clotting. Fibrin is formed through polymerization and is the component of the clot, that stops the bleeding.The doctor may recommend the fibrin test if the patient shows deficiencies in coagulation or if suffering from massive bleeding. The normal values of fibrin in the blood: 200-400 mg per 100 ml of blood.ibrin is formed through polymerization and is the component of the clot, that stops the bleeding. The doctor may recommend the fibrin test if the patient shows deficiencies in coagulation or if suffering from massive bleeding. The normal values of fibrin in the blood: 200-400 mg per 100 ml of blood.