tokens: In the DRA promoter , one of these cis-acting regulatory motifs is the X2-box to which nuclear factor X2 ( NF-X2 ) binds .
folded_tokens: in the dra promoter , one of these cis-acting regulatory motifs is the x2-box to which nuclear factor x2 ( nf-x2 ) binds .
labels: O O B-DNA_domain_or_region I-DNA_domain_or_region O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region O O B-protein_molecule I-protein_molecule I-protein_molecule O B-protein_molecule O O O