The third approach was to monitor the replication competence in U937 cells of an infectious HIV-1 provirus carrying point mutations in the kappaB-responsive elements of both long terminal repeats .
the third approach was to monitor the replication competence in u937 cells of an infectious hiv-1 provirus carrying point mutations in the kappab-responsive elements of both long terminal repeats .
O O O O O O O O O O B-cell_line I-cell_line O O O B-virus O O O O O O B-DNA_family_or_group I-DNA_family_or_group O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O