binding of the catecholamine beta-adrenergic antagonist , l-alprenolol , by the iggl anti-alprenolol monoclonal antibody 37a4 was examined using the radioligand 3h-dihydroalprenolol as an extrinsic signal and the increase in antibody fluorescence upon l-alprenolol binding as intrinsic signal .
C0012278
dihydroalprenolol
C0002334
alprenolol