the basal and depolarization-induced release of [ gln8 ] lhrh in the presence and absence of the opiate agonists [ d-ala2 , n-phe4-gly-ol5 ] enkephalin ( dago ) , which binds selectively to the mu-receptor subtype , and [ d-thr2 , l-leu5 ] enkephalyl-thr ( dtlet ) , which binds selectively to the delta-receptor subtype , and of the opiate antagonist naloxone was assessed in tissue obtained from birds at 4 , 8 , 12 , 16 , 20 , and 24 weeks of age .
C0014298
enkephalin
C0525773
dago