In nuclear extracts from monocytes or macrophages , induction of NF-KB occurred only if the cells were previously infected with HIV-1 .
in nuclear extracts from monocytes or macrophages , induction of nf-kb occurred only if the cells were previously infected with hiv-1 .
O B-cell_component I-cell_component O B-cell_type O B-cell_type O O O B-protein_molecule O O O O O O O O O B-virus O