antinociceptive dose-response curves were constructed for mu ( [ d-ala2 , nmephe4 , gly-ol ] enkephalin , dago ; morphine ) and delta ( [ d-pen2 , d-pen5 ] enkephalin , dpdpe ) -agonists in the absence , and in the presence of the mu non-surmountable antagonist , beta-funaltrexamine ( beta-fna ) or the delta-antagonist ici 174,864 ( n , n-diallyl-tyr-aib-aib-phe-leu-oh , where aib is alpha-amino-isobutyric acid ) .
C0014298
enkephalin
C0525773
dago