a protease that can be inhibited by glutathione , dithiothreitol , and o-phenanthroline but not by ethylenediaminetetraacetic acid converts the 50-kilodalton beta-adrenergic receptor in turkey erythrocyte membranes to a 40-kda polypeptide which retains the specific ligand binding site .
C0001643
beta-adrenergic receptor
C1517880
ligand binding