tokens: The production and characterization of Jurkat cell lines that constitutively express functional human immune deficiency virus type 1 ( HIV-1 ) tat protein , using a BK virus plasmid expression vector and HIV-1 tat cDNA , is described .
folded_tokens: the production and characterization of jurkat cell lines that constitutively express functional human immune deficiency virus type 1 ( hiv-1 ) tat protein , using a bk virus plasmid expression vector and hiv-1 tat cdna , is described .
labels: O O O O O B-cell_line I-cell_line I-cell_line O O O O B-virus I-virus I-virus I-virus I-virus I-virus O B-virus O B-protein_molecule I-protein_molecule O O O B-virus I-virus I-virus I-virus I-virus O B-virus O O O O O O