PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2489233-4 1989 Although inhibitors of the enkephalin degrading puromycin-insensitive, bestatin-sensitive aminopeptidase (possibly aminopeptidase M) their action is weak (IC50 = 32 microM leucine, 536 microM, glycine) and they might be considered to have a direct antinociceptive effect on opioid receptors. Leucine 172-179 alanyl aminopeptidase, membrane Homo sapiens 115-131