Protein C deficiency (3 common questions in part- 1 exam)

What is the function of protein C? Inactivation of factors Va and VIIIa What is the pathological process most likely responsible for increased propensity to clot in a patient diagnosed with protein C deficiency? Reduced degradation of factors Va and VIIIa What is the best test to detect protein-C deficiency? Copperhead snake venom assay