The double NF-kappaB site identified in the LTR of the human immunodeficiency virus-1 ( HIV-1 ) has been demonstrated to be necessary for efficient viral transcription .
the double nf-kappab site identified in the ltr of the human immunodeficiency virus-1 ( hiv-1 ) has been demonstrated to be necessary for efficient viral transcription .
O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O B-DNA_domain_or_region O O B-virus I-virus I-virus O B-virus O O O O O O O O O B-other_name I-other_name O