HS I , IV , and V were exclusively observed in the erythroid/megakaryocytic cell lines that express tal-1 from the promoters 1a and 1b .
hs i , iv , and v were exclusively observed in the erythroid/megakaryocytic cell lines that express tal-1 from the promoters 1a and 1b .
O O O O O O O O O O O O B-cell_line I-cell_line I-cell_line O O B-DNA_domain_or_region O O O O O O O