Human T-cell leukemia virus type 1 ( HTLV-1 ) Tax transforms normal T-cells in the presence of interleukin ( IL ) -2 in vitro .
human t-cell leukemia virus type 1 ( htlv-1 ) tax transforms normal t-cells in the presence of interleukin ( il ) -2 in vitro .
B-virus I-virus I-virus I-virus I-virus I-virus O B-virus O O O O B-cell_type O O O O B-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule I-protein_molecule O O O