groups of conscious rats received i.c.v . injections of either the mu-selective agonist , [ d-ala2 , mephe4 , gly-ol5 ] enkephalin ( damgo ) or the delta-selective agonist , [ d-pen2 , d-pen5 ] enkephalin ( dpdpe ) .
C0014298
enkephalin
C0525856
dpdpe