A vitamin K-dependent enzyme catalyzes the modification of glutamate residues in the amino-terminal domain of prothrombin to produce y-carboxyglutamate. Draw the structure of a y-carboxyglutamate amino acid. For your answer, follow these guidelines: - Draw the unionized version of the amino acid. - Do not abbreviate any carboxylic acid groups; for example, do not use COOH. - Use abbreviation R for terminals. In order to enter the radical R, hover over the radical and type "R" from the keyboard