tokens: Electrophoretic mobility shift assay showed that each of the cis-elements bound specific protein factors .
folded_tokens: electrophoretic mobility shift assay showed that each of the cis-elements bound specific protein factors .
labels: B-other_name I-other_name I-other_name I-other_name O O O O O B-DNA_family_or_group O O B-protein_family_or_group I-protein_family_or_group O