<prompt> Vitamin k is responsible for the carboxylation of which amino acid in the clotting factorsAspaateGlutamateProlineLysine  <response>: Ref Robbins 8e p 119;9e p119 The vitamin K-dependent carboxylase carries out the posttranslational modification of specific glutamate residues in proteins togamma-carboxy glutamic acid Gla in the presence of reduced vitamin K, molecular oxygen, and carbon dioxide. 