the contribution of affinity and efficacy to the agonistic actions of the naturally occurring catecholamines , ( - ) -noradrenaline and ( - ) -adrenaline at beta-adrenoceptor sites were assessed in guinea-pig driven left atrial ( beta 1 ) and k+-depolarized uterine ( beta 2 ) preparations .
C0028351
noradrenaline
C0014563
adrenaline