In coagulation, the procoagulant protein factor X can be activated into factor Xa in two ways: either extrinsically or intrinsically. The activating complexes are together called<unk> .<unk>  is a blend word of "ten" and the suffix "-ase", which means, that the complex activates its substrate (inactive factor X) by cleaving it. Extrinsic<unk>  complex is made up of tissue factor, factor VII, and Ca2+ as an activating ion. Intrinsic<unk>  complex contains the active factor IX (IXa), its cofactor factor VIII (VIIIa), the substrate (factor X), and they are activated by negatively charged surfaces (such as glass, active platelet membrane, sometimes cell membrane of monocytes). These vitamin K-dependent procoagulant factors dock to this surface through their Gla domain with Ca2+ bridges.
Tenase
Dispase
Pegaspargase
Coagulase
Amidase
Hemostat
Serpin
Proteases 