tokens: To determine the effects on transcriptional regulation , U937 cells were transfected with a plasmid containing the HIV-1 enhancer ( bearing two NF-kappa B sites ) coupled to a chloramphenicol acetyltransferase ( CAT ) reporter .
folded_tokens: to determine the effects on transcriptional regulation , u937 cells were transfected with a plasmid containing the hiv-1 enhancer ( bearing two nf-kappa b sites ) coupled to a chloramphenicol acetyltransferase ( cat ) reporter .
labels: O O O O O B-other_name I-other_name O B-cell_line I-cell_line O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-protein_complex I-protein_complex O O O O O B-protein_molecule I-protein_molecule O B-protein_molecule O O O