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
Respiratory system
Carboxylation
Hydroxylation
Deaminatiom
Hydrolysis
Carboxylation