Which of the following is a common feature of both vitamin K and vitamin C?
A. The synthesis of clotting factors
B. Posttranslational modificationsC. Antioxidant mechanisms
D. The microsomal hydroxylation reactions
Ans.
B. Posttranslational modification.
Vitamin C is required in the hydroxylation of proline
and lysine in collagen biosynthesis. Vitamin C is helpful in the
posttranslational modification in procollagen. Vitamin K is required in
clotting factor biosynthesis in the posttranslational modification of glutamate
residue.
- Clotting factor biosynthesis is the function of vitamin K, not of
vitamin C.
- Vitamin C is an antioxidant other
includes vitamin A and E. , while this property is not shown by vitamin K.
