tokens: In order to apprehend the role of the HIV1 tat gene in inducing the differentiation of HIV1 -infected U937 cells , we have successfully introduced this gene into U937 cells by infecting them with retroviral particles transducing tat .
folded_tokens: in order to apprehend the role of the hiv1 tat gene in inducing the differentiation of hiv1 -infected u937 cells , we have successfully introduced this gene into u937 cells by infecting them with retroviral particles transducing tat .
labels: O O O O O O O O B-virus O O O O O O O B-virus O B-cell_line I-cell_line O O O O O O O O B-cell_line I-cell_line O O O O B-other_organic_compound I-other_organic_compound O B-DNA_domain_or_region O