binding studies with the beta-adrenoceptor antagonist ligand [ 3h ] -dihydroalprenolol ( [ 3h ] -dha , spec . act , 90-102 ci/mmol ) were performed with ventricular membranes l-d-synchronized ( l:0.7-19 hr , d : -07 hr ) male rats , sacrificed either at 08 hr or at 20 hr .
C1517880
binding
C0001643
beta-adrenoceptor