N-[(2S,3R)-3-Amino-2-hydroxy-4-phenylbutyryl]-L-leucine hydrochloride Specificity: Competitive inhibitor of surface aminopeptidases, including aminopeptidase B (K_i=2nM), leucine aminopeptidase (K_i=20nM). Also inhibits aminopeptidases N; does not inhibit endoproteases. …