Thus , NF-kappa B , a potent transcriptional activator of HIV expression , is also involved in the expression of RANTES , a chemokine that blocks infection by macrophage-tropic strains of HIV .
thus , nf-kappa b , a potent transcriptional activator of hiv expression , is also involved in the expression of rantes , a chemokine that blocks infection by macrophage-tropic strains of hiv .
O O B-protein_complex I-protein_complex O O O O O O B-virus O O O O O O O O O B-protein_molecule O O B-protein_family_or_group O O O O B-virus I-virus O B-virus O