these results demonstrate the applicability of using [ 125i ] para-azidobenzylcarazolol to covalently label mammalian beta-adrenergic receptors and suggest that mammalian beta 1 and beta 2 receptor binding sites primarily reside on peptides of mr 62,000-65,000 and that smaller ligand binding fragments may arise by proteolysis .
C1417249
mr
C1517880
ligand binding