tokens: Within this region , a 19-bp nuclear factor binding site ( -570 to -552 ) was characterized by DNase I footprinting and electromobility shift assay .
folded_tokens: within this region , a 19-bp nuclear factor binding site ( -570 to -552 ) was characterized by dnase i footprinting and electromobility shift assay .
labels: 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 O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O B-protein_molecule I-protein_molecule O O B-other_name I-other_name I-other_name O