Both positive and negative regulatory elements were identified in the proximal 5' flanking region of the IL-3 gene .
both positive and negative regulatory elements were identified in the proximal 5' flanking region of the il-3 gene .
O O O O O 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 O O B-DNA_domain_or_region I-DNA_domain_or_region O