tokens: Role of the camp response element site in mediating repression by the upstream regulatory region .
folded_tokens: role of the camp response element site in mediating repression by the upstream regulatory region .
labels: O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O