<prompt> The role of vitamin K in epoxide cycle is -Carboxylation of aspartateDehydrogenation of glucatamateCarboxylation of glutamateDehydrogenation of aspartate  <response>: Ans. is c i.e., Carboxylation of glutamate o The only known biological role of vitamin K is as a cofactor for an enzyme carboxylase that catalyzes carboxylationQ of glutamic acid glutamate Q residues on vitamin K-dependent proteins. The important vitamin K dependent proteins are ; -i Coagulation proteins: - Factor IIQ prothrombinQ, factor VIIQ proconvertin0, factor IXQ christmas factor, and factor XQ Stuart-Prower factor,ii Anticoagulation proteins : - Proteins Q S and Z.iii Gas 6 