What is the heparin cofactor?

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Quizplus · Accepted Answer

The heparin cofactor is also known as antithrombin III (AT III). It is a plasma protein that inhibits the activity of several coagulation factors, including thrombin and factor Xa. Heparin enhances the activity of AT III, hence the name "heparin cofactor". Protein C is a natural anticoagulant that also inhibits clotting factors, but it does not directly interact with heparin. Warfarin and coumarin are medications used to prevent blood clots, but they do not have any direct relationship with the heparin cofactor.

What Is the Heparin Cofactor