tokens: DNase I hypersensitive site ( DHS ) mapping revealed that the perforin locus contained six DHS within 7 . 0 kb of the 5' upstream sequence ( -7 . 0 kb ) and two DHS in intron 2 .
folded_tokens: dnase i hypersensitive site ( dhs ) mapping revealed that the perforin locus contained six dhs within 7 . 0 kb of the 5' upstream sequence ( -7 . 0 kb ) and two dhs in intron 2 .
labels: B-DNA_domain_or_region I-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 I-DNA_domain_or_region O O B-DNA_domain_or_region O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O O O O O O B-DNA_domain_or_region O B-DNA_domain_or_region I-DNA_domain_or_region O