In epithelial cells , the Z transactivator alone produced maximal stimulation of the EA-D promoter ; the effect of R and Z together was no greater than that of Z alone .
in epithelial cells , the z transactivator alone produced maximal stimulation of the ea-d promoter ; the effect of r and z together was no greater than that of z alone .
O B-cell_type I-cell_type O O B-protein_molecule I-protein_molecule O O O O O O B-protein_molecule O O O O O B-protein_molecule O B-protein_molecule O O O O O O O B-protein_molecule O O