tokens: We investigated the upstream regulatory elements of the human IL-4 promoter .
folded_tokens: we investigated the upstream regulatory elements of the human il-4 promoter .
labels: 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 I-DNA_domain_or_region I-DNA_domain_or_region O