When the constructs were transfected into OCIM1 cells , which do not express zeta-globin , the zeta-globin promoters were at best 20% as active as the alpha-globin promoters .
when the constructs were transfected into ocim1 cells , which do not express zeta-globin , the zeta-globin promoters were at best 20% as active as the alpha-globin promoters .
O O O O O O B-cell_line I-cell_line O O O O O B-protein_family_or_group O O B-protein_family_or_group O O O O O O O O O B-DNA_family_or_group B-DNA_family_or_group O