cytoplasmic progesterone and estrogen receptors were measured by the single-saturating-dose technique using [ 17 alpha-methyl-3h ] -17 alpha , 21-dimethyl-19-norpregna-4,9-diene-3,20-dione and [ 3h ] estradiol as the labeled ligands for each assay , respectively .
C0010834
cytoplasmic
C0034804
estrogen receptors