tokens: Identification of sequence alterations in the upstream regulatory region of the estrogen receptor gene in an ER-negative breast cancer cell line .
folded_tokens: identification of sequence alterations in the upstream regulatory region of the estrogen receptor gene in an er-negative breast cancer cell line .
labels: O O B-other_name I-other_name O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-cell_line I-cell_line I-cell_line I-cell_line I-cell_line O