tokens: Overexpression of Bcl-3 in TF-1 cells by transient transfection along with the NF-kappaB factors p50 or p52 resulted in significant induction of an human immunodeficiency virus-type 1 ( HIV-1 ) kappaB-TATA-luceriferase reporter plasmid , demonstrating that Bcl-3 has a positive role in transactivation of kappaB-containing genes in erythroid cells .