[ d-ala2 , mephe4 , gly ( ol ) 5 ] enkephalin ( dago ; 0.1-0.5 microgram i.c.v . ) , a selective mu receptor agonist , produced an increase in the ha turnover , whereas [ d-thr2-leu5 ] enkephalin , thr ( 0.1-1.0 microgram i.c.v . ) , a selective delta receptor agonist , had little effect on the ha turnover .
C0525773
dago
C0014298
enkephalin