The detection of estrogen and progesterone receptors ( ER and PR ) localized in the cell nucleus can be achieved by the same assay .
the detection of estrogen and progesterone receptors ( er and pr ) localized in the cell nucleus can be achieved by the same assay .
O O O B-protein_family_or_group O B-lipid O O B-protein_family_or_group O B-protein_family_or_group O O O O B-cell_component B-cell_component O O O O O O O O