The heparin binding site of protein C inhibitor is protease-dependent.

Abstract excerpt

Protein C inhibitor (PCI) is a member of the serpin family of protease inhibitors with many biological functions and broad inhibitory specificity. Its major targets in blood are thrombin and activated protein C (APC), and the inhibition of both enzymes can be accelerated by glycosaminoglycans, including heparin. Acceleration of thrombin and APC inhibition by PCI requires that both protease and inhibitor bind to...

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