tokens: We have conducted functional studies of the enhancer elements of human T-cell leukemia virus type I ( HTLV-I ) using the human T-cell lines Jurkat and MOLT 4 , which are negative for HTLV-I , and MT-2 and TL-Mor , which carry the proviral genome of HTLV-I .
folded_tokens: we have conducted functional studies of the enhancer elements of human t-cell leukemia virus type i ( htlv-i ) using the human t-cell lines jurkat and molt 4 , which are negative for htlv-i , and mt-2 and tl-mor , which carry the proviral genome of htlv-i .
labels: O O O O O O O B-DNA_domain_or_region I-DNA_domain_or_region O B-virus I-virus I-virus I-virus I-virus I-virus O B-virus O O O B-cell_line I-cell_line I-cell_line B-cell_line O B-cell_line I-cell_line O O O O O B-virus O O B-virus O B-virus O O O O O O O B-virus O