For what reaction is vitamin KH2 required as a coenzyme?
◦ the carboxylation of the gamma-carbon of the glutamate side chain in proteins
◦ the carboxylation of the alpha-carbon of the aspartate side chain in proteins
◦ the carboxylation of the alpha-carbon of the glutamate side chain in proteins
◦ the carboxylation of the beta-carbon of the aspartate side chain in proteins
◦ the carboxylation of the beta-carbon of the glutamate side chain in proteins