text: The aim of this study was, therefore, to provide comparative binding characteristics of agonists (epinephrine, norepinephrine, isoproterenol, fenoterol, salbutamol, salmeterol, terbutalin, formoterol, broxaterol) and antagonists (propranolol, alprenolol, atenolol, metoprolol, bisoprolol, carvedilol, << pindolol >>, BRL 37344, CGP 20712, SR 59230A, CGP 12177, ICI 118551) at all three subtypes of [[ human beta-adrenergic receptors ]] in an identical cellular background.