In this report , we show that the minimal CD4 promoter has four factor binding sites , each of which is required for full function .
in this report , we show that the minimal cd4 promoter has four factor binding sites , each of which is required for full function .
O O O O O O O O O B-protein_molecule 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 O O