Therefore , the surprisingly high replicative capacity of NF-kappaB and Sp1 binding site mutants of SIVmac is due to unique features or the enhancer/promoter region .
therefore , the surprisingly high replicative capacity of nf-kappab and sp1 binding site mutants of sivmac is due to unique features or the enhancer/promoter region .
O O O O O O O O O O O O O O O B-virus O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O