<prompt> All are vitamin K dependent clotting factors of hepatic origin exceptIIVIIVIIIX  <response>: Vitamin K has an impoant role in the blood clotting process. It brings about the posttranslational modification of ceain blood clotting factors clotting factor II prothrombin, factor VII SPCA factor IX Christmas factor factor X Stua prower factor they are synthesized as inactive precursors zymogens in the liver ref DM Vasudevan 8th ed page 462 