Aspartate Proteases Display a Variety of Substrate Specificities

Multiple Choice

Aspartate proteases display a variety of substrate specificities.Which of the following peptide bonds,however,do they most actively cleave?

A) those on the carboxyl side of the basic amino acids
B) those on the amino side of aromatic amino acids
C) those between 2 small,neutral residues
D) those between 2 hydrophobic amino acid residues