Both Vitamin K and C are involved in
Vitamin C plays the role of a coenzyme in the hydroxylation of proline and lysine while procollagen is conveed to collagen (i.e. post-translational modification). The functions of vitamin K are concerned with the blood clotting process. It brings about the posttranslational (after protein biosynthesis in the cell) modification of ceain blood clotting factors ii, vii, ix, x ref Satyanarayana 4th ed page 130, 132
The synthesis of clotting factors
Post translational modifications
Antioxidant mechanisms
The microsomal hydroxylation reactions
vitamins