tokens: In a mobility shift assay , only the NF-kappa B ( p50 /p50 ) homodimer was observed in a complex formed with the kappa B sequence in unstimulated SP-B21 cells .
folded_tokens: in a mobility shift assay , only the nf-kappa b ( p50 /p50 ) homodimer was observed in a complex formed with the kappa b sequence in unstimulated sp-b21 cells .
labels: O O B-other_name I-other_name I-other_name O O O B-protein_molecule I-protein_molecule O B-protein_subunit B-protein_subunit O O O O 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 O