Furthermore , a positive regulatory element was found 45 bp downstream of the NRE .
furthermore , a positive regulatory element was found 45 bp downstream of the nre .
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 O B-DNA_domain_or_region O