the influence of i.v . vs. i.c.v . administration of [ ( d-ala2 , metphe4 , gly-ol5 ] enkephalin ( damgo ) and morphine ) , kappa u 50488 and ethylketocyclazocine and delta ( [ d-pen2 , d-pen5 ] enkephalin ( dpdpe ) ] opioid agonists on gastric relaxation induced by a standard meal was evaluated in conscious dogs with strain-gauge transducers implanted on the gastric fundus and antrum .
C0014298
enkephalin
C0525856
dpdpe