Purified OTF1 from HeLa cells and OTF1 and OTF2 from B cells bound to identical sequences within the heavy-chain promoter .
purified otf1 from hela cells and otf1 and otf2 from b cells bound to identical sequences within the heavy-chain promoter .
O B-protein_molecule O B-cell_line I-cell_line O B-protein_molecule O B-protein_molecule O B-cell_type I-cell_type O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O