Vitamin K is a cofactor in
Refer Katzung 10/e p 549 Vitamin K is involved in activition if various clotting factors as well as anticlotting clotting proteins It carries out the final step in activation of these ors I. E, gamma carboxylation of glutamate residues in these factors
Carboxylation
Hydroxylation
Deaminatiom
Hydrolysis
Respiratory system