tokens: Deletional and site-directed mutagenesis revealed the presence of multiple functionally critical cis elements within this region , one of which was a nuclear factor ( NF ) -kappaB consensus sequence .
folded_tokens: deletional and site-directed mutagenesis revealed the presence of multiple functionally critical cis elements within this region , one of which was a nuclear factor ( nf ) -kappab consensus sequence .
labels: B-other_name O B-other_name I-other_name O O O O O O O B-DNA_family_or_group I-DNA_family_or_group O 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 I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O