Functional roles of in vivo footprinted DNA motifs within an alpha-globin enhancer .
functional roles of in vivo footprinted dna motifs within an alpha-globin enhancer .
O O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O B-DNA_domain_or_region I-DNA_domain_or_region O