thrombin

thrombin

1. An enzyme (proteinase), formed in shed blood, that converts fibrinogen into fibrin by hydrolyzing peptides (and amides and esters) of l-arginine; formed from prothrombin by the action of prothrombinase (factor Xa, another proteinase). 2. A sterile protein substance prepared from prothrombin of bovine origin through interaction with thromboplastin in the presence of calcium; causes clotting of whole blood, plasma, or a fibrinogen solution; used as a topical hemostatic for capillary bleeding with or without fibrin foam in general and plastic surgical procedures.factor IIa, fibrinogenase, thrombase, thrombosin;
human t. t. obtained from human plasma by precipitation with suitable salts and organic solvents; same uses as t.

 

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