Ten mutants of the simian immunodeficiency virus ( SIV ) SIVmac239 bearing deletions ( delta ) or substitutions ( subst ) in the NF-kappaB and/or Sp1 binding elements were created , and the replicative capacities of the mutants were analyzed .
ten mutants of the simian immunodeficiency virus ( siv ) sivmac239 bearing deletions ( delta ) or substitutions ( subst ) in the nf-kappab and/or sp1 binding elements were created , and the replicative capacities of the mutants were analyzed .
O O O O B-virus I-virus I-virus O B-virus O B-virus O B-other_name O O O O B-other_name O O O O O B-protein_molecule O B-protein_molecule O O O O O O O O O O O O O O O