title: Structure-activity evidence against opiate receptor involvement in Leu5-enkephalin-induced pulmonary vasoconstriction.
mesh_terms: D000818:Animals; D004743:Enkephalin, Leucine / Q000378:metabolism / Q000494:pharmacology*; D008168:Lung / Q000098:blood supply*; D008297:Male; D010446:Peptide Fragments / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains; D011957:Receptors, Opioid / Q000187:drug effects / Q000502:physiology*; D013329:Structure-Activity Relationship; D014661:Vasoconstriction / Q000187:drug effects*
chemical_list: D010446:Peptide Fragments; D011957:Receptors, Opioid; D004743:Enkephalin, Leucine