Prior analyses have demonstrated that the enhancer contains a 28-bp core region and local adjacent augmentative cis elements .
prior analyses have demonstrated that the enhancer contains a 28-bp core region and local adjacent augmentative cis elements .
O O O O O O B-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O B-DNA_family_or_group I-DNA_family_or_group O