Identification of a major positive regulatory element located 5' to the human zeta-globin gene .
identification of a major positive regulatory element located 5' to the human zeta-globin gene .
O O O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O