In addition , extracellular factor ( s ) released by X-ray-treated human colonic carcinoma cell line ( HT29 ) might activate the long terminal repeat ( LTR ) of HIV-1 in non-irradiated HT29 cells .
in addition , extracellular factor ( s ) released by x-ray-treated human colonic carcinoma cell line ( ht29 ) might activate the long terminal repeat ( ltr ) of hiv-1 in non-irradiated ht29 cells .
O O O B-protein_family_or_group I-protein_family_or_group O O O O O B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O B-cell_line O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O B-DNA_domain_or_region O O B-virus O B-cell_line I-cell_line I-cell_line O