Reduced vitamin K is needed for the synthesis of prothrombin. An enzyme, vitamin K epoxide reductase (VKOR), converts vitamin K to reduced vitamin K. The diagram on the top shows this conversion. Another diagrams show the structures of warfarin and vitamin K. Using the information in the diagrams, suggest why warfarin inhibits the synthesis of prothrombin.Reduced vitamin K is needed for the synthesis of prothrombin.