Is fibrin and fibrinogen considered enyzmes?

Answer 1

that might depend on one's definition of 'enzyme,' but i would not consider them enzymes. enzymes typically catalyze chemical reactions, like adding phosphate groups to proteins or rearranging the atoms in metabolic intermediates. fibrinogen is cleaved by the enzyme thrombin into fibrin, which forms the major part of the fibrin plug. as far as i know, fibrin and fibrinogen do not catalyze a chemical reaction, but are the product and substrate, respectively, of the reaction catalyzed by thrombin. by this reasoning, they are no more 'enzymes' than, say, hair or collagen.

Answer 2

Not really....Fibrinogen is a proenzyme (inactive enzyme prescursor) while Fibrin, though made from Fibrinogen, is a glycoprotein, involved in the formation of a blood clot. These are polymeric proteins, not enzymes..

Answer 3

no, they are proteins but as such do not catalyze any reactions. in fact they themselves undergo change and polymerization on enzymatic activity of the clotting factors. his is what i think.