tokens: The OTF interactions we observed extended over the heptamer element 5'-CTCAGGA-3' , and it seems likely that the binding of the purified factors involves cooperation between octamer and heptamer sites in this promoter .
folded_tokens: the otf interactions we observed extended over the heptamer element 5'-ctcagga-3' , and it seems likely that the binding of the purified factors involves cooperation between octamer and heptamer sites in this promoter .
labels: O B-other_name I-other_name O O O O O B-DNA_domain_or_region I-DNA_domain_or_region B-polynucleotide O O O O O O O O O O B-protein_family_or_group I-protein_family_or_group O O O O O O O O O B-DNA_domain_or_region O