thus , the two preferential mu agonists tyr-d-ala-gly-mephe-gly-ol ( dago ; 10 microm ) and tyr-d-ala-gly-mephe-met ( o ) 5-oh ( fk-33824 ; 0.1 microm ) enhanced spli overflow from depolarized tissues , whereas the selective delta agonists tyr-d-thr-gly-phe-leu-thr ( deltakephalin ; 3 microm ) and [ 2-d-penicillamine , 5-d-penicillamine ] enkephalin ( 50 microm ) reduced it .
C0525773
dago
C0014298
enkephalin