displacement curve analyses demonstrated that gtp and its nonhydrolyzable analog , gpp ( nh ) p , inhibited the binding of [ 3h ] dihydromorphine ( mu agonist ) , [ 3h ] d-ala2-d-leu5-enkephalin ( delta agonist ) , and [ 3h ] ethylketocyclazocine ( general agonist ) but not [ 3h ] diprenorphine ( general antagonist ) .
C0018353
gtp
C0018366
gpp ( nh ) p