The stage selector activity was localized to a region centered on nucleotides +13 to +15 .
the stage selector activity was localized to a region centered on nucleotides +13 to +15 .
O B-other_name I-other_name I-other_name O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O