These experiments show the presence of a strong positive-acting element , located between -417 and -207 bp 5' to the zeta-globin mRNA cap site , is necessary for high-level promoter activity in K562 cells .
these experiments show the presence of a strong positive-acting element , located between -417 and -207 bp 5' to the zeta-globin mrna cap site , is necessary for high-level promoter activity in k562 cells .
O O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-protein_family_or_group O O O O O O O B-other_name I-other_name I-other_name O B-cell_line I-cell_line O