About The Medical Condition XIIa, Coagulation Factor

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Find the definition of the medical term XIIa, Coagulation Factor. XIIa, Coagulation Factor defined and explained for easy understanding at the Medical Conditions from ClusterMed.info.

XIIa, Coagulation Factor

XIIa, Coagulation Factor Medical Condition Defined & Explained
XIIa, Coagulation Factor Medical Condition

What's The Definition Of The Medical Condition XIIa, Coagulation Factor?

Activated form of factor XII. In the initial event in the intrinsic pathway of blood coagulation, kallikrein (with cofactor HIGH MOLECULAR WEIGHT KININOGEN) cleaves factor XII to XIIa. Factor XIIa is then further cleaved by kallikrein, plasmin, and trypsin to yield smaller factor XII fragments (Hageman-Factor fragments). These fragments increase the activity of prekallikrein to kallikrein but decrease the procoagulant activity of factor XII.

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