to determine the effect of calcium-channel blockers on beta-adrenergic receptors , we studied the interactions of verapamil , diltiazem , and nifedipine with both human lymphocyte beta 2-adrenergic receptors and rat myocardial beta 1-adrenergic receptors by means of radioligand binding assays .
C0086418
human
C0001643
beta 2-adrenergic receptors