the order of potency of a series of agonists competing for [ 125i ] cyanopindolol binding is consistent with the interaction of a beta 2-subtype receptor : zinterol greater than ( - ) isoproterenol greater than ( - ) epinephrine = salbutamol much greater than ( - ) norepinephrine .
C0014563
epinephrine
C0028351
norepinephrine