In electrophoretic mobility shift assays , NF kappa B binds to both conserved sites in the HIV-1 transcriptional enhancer and only to the single conserved site in the HIV-2 transcriptional enhancer .
in electrophoretic mobility shift assays , nf kappa b binds to both conserved sites in the hiv-1 transcriptional enhancer and only to the single conserved site in the hiv-2 transcriptional enhancer .
O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule O O O O O O O B-virus O O O O O O O O O O O B-virus O O O