Using in vitro footprinting and gel shift assays , we have identified four distinct binding sites for nuclear proteins within this positive regulatory element .
using in vitro footprinting and gel shift assays , we have identified four distinct binding sites for nuclear proteins within this positive regulatory element .
O O B-other_name I-other_name O B-other_name I-other_name I-other_name O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O B-protein_family_or_group I-protein_family_or_group O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O