tokens: These constructs were transfected into either HeLa cells , Jurkat cells or U937 cells in both the presence and absence of phorbol esters which have previously been demonstrated to activate HIV gene expression .
folded_tokens: these constructs were transfected into either hela cells , jurkat cells or u937 cells in both the presence and absence of phorbol esters which have previously been demonstrated to activate hiv gene expression .
labels: O O O O O O B-cell_line I-cell_line O B-cell_line I-cell_line O B-cell_line I-cell_line O O O O O O O B-other_organic_compound I-other_organic_compound O O O O O O O B-other_name I-other_name I-other_name O