Because HIV-1 requires active NF-kappa B for efficient transcription , we tested the effect of HIV-1 infection on the processing of the human 105K precursor .
because hiv-1 requires active nf-kappa b for efficient transcription , we tested the effect of hiv-1 infection on the processing of the human 105k precursor .
O B-virus O O B-protein_molecule I-protein_molecule O O O O O O O O O B-virus O O O O O O B-protein_molecule I-protein_molecule I-protein_molecule O