The NF-kappa B site at positions -206 to -195 of the IL-2 promoter was required but not sufficient for the Tat effect .
the nf-kappa b site at positions -206 to -195 of the il-2 promoter was required but not sufficient for the tat effect .
O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-protein_molecule O O O O O O O O B-protein_molecule O O