tokens: To investigate the regulation of IL-13 gene expression by T cells , we isolated and sequenced the human IL-13 gene , analyzed its 5'-flanking region for potential transcriptional activation elements , and examined its expression in nontransformed T-lineage cell populations .
folded_tokens: to investigate the regulation of il-13 gene expression by t cells , we isolated and sequenced the human il-13 gene , analyzed its 5'-flanking region for potential transcriptional activation elements , and examined its expression in nontransformed t-lineage cell populations .
labels: O O O O O B-protein_molecule O O O B-cell_type I-cell_type O O O O O O O B-protein_molecule O O O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-DNA_family_or_group I-DNA_family_or_group I-DNA_family_or_group O O O O O O B-cell_line I-cell_line I-cell_line I-cell_line O