when adipocyte membranes are successively exposed to ( - ) -propranolol or ( +/- alprenolol at 25 or 4 degrees c , repeatedly washed and then assayed for ( - ) - [ 3h ] dihydroalprenolol binding , the apparent number of beta-adrenergic binding sites is markedly decreased .
C0002334
alprenolol
C0012278
dihydroalprenolol