Technoclone Protein C Deficient Plasma is a lyophilized immunodepleted human plasma with a protein C content < 1%. For use in combination with Protac® in the modified aPTT-based determination of protein C activity.

Protein C is activated by the Protein C Activator Protac® (a component of the snake venom from Agkistrodon contortrix). Using Protein C Deficient Plasma the anticoagulant effect of Activated Protein C (APC) on the activated Partial Thromboplastin Time (aPTT) is determined.