tokens: An LT promoter ( LT-293 ) CAT construct that contained an NF-kappa B site was active in the LT-producing C81-66-45 cell line , which contains defective HTLV-I but expresses tax .
folded_tokens: an lt promoter ( lt-293 ) cat construct that contained an nf-kappa b site was active in the lt-producing c81-66-45 cell line , which contains defective htlv-i but expresses tax .
labels: O B-DNA_domain_or_region I-DNA_domain_or_region O B-DNA_domain_or_region O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O B-cell_line I-cell_line I-cell_line I-cell_line O O O O B-virus O O B-protein_molecule O