ID 3.4.21.38 DE coagulation factor XIIa. AN Hageman factor. CA Selective cleavage of Arg-|-Ile bonds in factor VII to form factor VIIa CA and factor XI to form factor XIa. CC -!- Also activates plasma prekallikrein and plasminogen. CC -!- Formed from the proenzyme, factor XII, by plasma kallikrein or factor CC XIIa. CC -!- Belongs to peptidase family S1. DR P98140, FA12_BOVIN ; Q04962, FA12_CAVPO ; P00748, FA12_HUMAN ; DR Q80YC5, FA12_MOUSE ; O97507, FA12_PIG ; D3ZTE0, FA12_RAT ; //