Five major DNase-I hypersensitive sites ( HS ) were mapped in the tal-1 locus .
five major dnase-i hypersensitive sites ( hs ) were mapped in the tal-1 locus .
O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O B-DNA_domain_or_region O O O O O B-DNA_domain_or_region O O