a simple and rapid clotting method for the quantitative determination of protein c ( pc ) in plasma consists of the conversion of pc into activated pc ( apc ) by means of protac , an activator protein isolated from agkistrodon contortrix contortrix venom , of the subsequent degradation of factors v and viii in pc immuno-depleted plasma by the generated apc and of the measurement of the prolongation of the activated partial thromboplastin time ( aptt ) which is proportional to the amount of pc in the sample .
C0005778
clotting
C3540812
apc