a) is the structure β8 of glutamate carboxypeptidase II within the enzyme, on the surface or completely exposed to cytosol. Explain.
b) what favourable interaction(s) are there for the sidechain of D with other amino acid side chains within structure α4?
c) what favourable interaction(s) are there for backbone amide atoms for residue 186 with other amino acid within structure α4?