tokens: HIVs in which the NF-kappa B/Sp1 enhancer plus the downstream TATA element were replaced with heterologous enhancer/promoters were also constructed .
folded_tokens: hivs in which the nf-kappa b/sp1 enhancer plus the downstream tata element were replaced with heterologous enhancer/promoters were also constructed .
labels: B-virus O O 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 O B-DNA_domain_or_region I-DNA_domain_or_region O O O O