ID 3.4.21.68 DE t-plasminogen activator. AN tissue plasminogen activator. AN tissue-type plasminogen activator. AN tPA. CA Specific cleavage of Arg-|-Val bond in plasminogen to form plasmin. CC -!- From a wide variety of mammalian tissues, especially endothelial CC cells. CC -!- Secreted as a single chain precursor which is cleaved to a two-chain CC form by plasmin. CC -!- Activity is considerably enhanced by fibrin. CC -!- Belongs to peptidase family S1. CC -!- Formerly EC 3.4.21.31 and EC 3.4.99.26. DR Q28198, TPA_BOVIN ; P00750, TPA_HUMAN ; P11214, TPA_MOUSE ; DR Q8SQ23, TPA_PIG ; Q5R8J0, TPA_PONAB ; P19637, TPA_RAT ; DR P98119, URT1_DESRO ; P15638, URT2_DESRO ; P98121, URTB_DESRO ; DR P49150, URTG_DESRO ; //