tokens: It was shown by transient expression assay that HS-40 behaved as an authentic enhancer for high-level zeta 2 globin promoter activity in K562 cells , an erythroid cell line of embryonic and/or fetal origin .
folded_tokens: it was shown by transient expression assay that hs-40 behaved as an authentic enhancer for high-level zeta 2 globin promoter activity in k562 cells , an erythroid cell line of embryonic and/or fetal origin .
labels: O O O O O O O O B-DNA_domain_or_region O O O O B-DNA_domain_or_region O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O B-cell_line I-cell_line O O O O O O O O O O O