title: High affinity of carozolol for beta-adrenoceptors coupled to the adenylyl cyclase in ventricular myocardium of kitten and Xenopus laevis.
abstract: Catecholamine-induced stimulation of adenylyl cyclase in ventricular membranes of kitten and Xenopus laevis was antagonized competitively by carazolol. Apparent equilibrium constants ranging between 100-170 pM were estimated for the beta-adrenoceptor-carazolol complex.
mesh_terms: D000262:Adenylyl Cyclases / Q000378:metabolism*; D000818:Animals; D002227:Carbazoles / Q000378:metabolism*; D002415:Cats; D066298:In Vitro Techniques; D007545:Isoproterenol / Q000494:pharmacology; D007700:Kinetics; D009206:Myocardium / Q000201:enzymology / Q000378:metabolism*; D009638:Norepinephrine / Q000494:pharmacology; D011412:Propanolamines / Q000378:metabolism*; D011941:Receptors, Adrenergic / Q000378:metabolism*; D011943:Receptors, Adrenergic, beta / Q000378:metabolism*; D014981:Xenopus
chemical_list: D002227:Carbazoles; D011412:Propanolamines; D011941:Receptors, Adrenergic; D011943:Receptors, Adrenergic, beta; D000262:Adenylyl Cyclases; D007545:Isoproterenol; D009638:Norepinephrine