Deletion mapping and hybrid promoter constructs demonstrate that the newly identified Tat -responsive element corresponds to a sequence within the viral long terminal repeat ( LTR ) previously identified as the HIV-1 enhancer , or NF-kappa B domain .
deletion mapping and hybrid promoter constructs demonstrate that the newly identified tat -responsive element corresponds to a sequence within the viral long terminal repeat ( ltr ) previously identified as the hiv-1 enhancer , or nf-kappa b domain .
O O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O O O O B-protein_molecule O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O B-DNA_domain_or_region O O O O O B-virus O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O