x-ray film exposed to sections of guinea pig heart incubated previously with [ 125i ] cyanopindolol with or without ici 118,551 ( 70 nm ) or cgp 20712a ( 100 nm ) or ( - ) -propranolol ( 1 microm ) showed a high density and even distribution of beta-1 adrenoceptors and a lower density and even distribution of beta-2 adrenoceptors over the myocardium .
C0018787
heart
C0027061
myocardium