The enzyme hexokinase adds a phosphate to D-glucose but ignores its mirror image, L-glucose. Suppose that you were able to synthesize hexokinase entirely from D amino acids, which are the mirror image of the normal L-amino acids.

A. Assuming that the “D” enzyme would fold to a stable conformation, what relationship would you expect it to bear to the normal “L” enzyme?

B. Do you suppose the “D” enzyme would add a phosphate to L-glucose, and ignore D-glucose?