The HTLV-I LTR contains three conserved regulatory elements known as 21 base pair repeats which are required for stimulation of gene expression by the transactivator protein tax .
the htlv-i ltr contains three conserved regulatory elements known as 21 base pair repeats which are required for stimulation of gene expression by the transactivator protein tax .
O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-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 I-DNA_domain_or_region O O O O O O B-other_name I-other_name O O B-protein_family_or_group I-protein_family_or_group B-protein_molecule O