tokens: The human T-cell leukemia virus type 1 ( HTLV-1 ) transcriptional trans-activator Tax has been demonstrated to have transforming activity in multiple cell culture and transgenic-mouse models .
folded_tokens: the human t-cell leukemia virus type 1 ( htlv-1 ) transcriptional trans-activator tax has been demonstrated to have transforming activity in multiple cell culture and transgenic-mouse models .
labels: O B-virus I-virus I-virus I-virus I-virus I-virus O B-virus O O O B-protein_molecule O O O O O O O O B-cell_line I-cell_line I-cell_line O B-other_artificial_source I-other_artificial_source O