In contrast , factors in addition to NF-kappa B are required to activate HIV-2 transcription in infected T cells .
in contrast , factors in addition to nf-kappa b are required to activate hiv-2 transcription in infected t cells .
O O O O O O O B-protein_molecule I-protein_molecule O O O O B-virus O O B-cell_type I-cell_type I-cell_type O