PubMed:8444885 JSONTXT

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TPA induction inhibits the binding of the lineage limited transcription factor NF-E2 to this transcriptional control element. Hemin induction of K562 cells does not facilitate the binding of NF-E2 to its recognition site. Hemin induction appears to nonspecifically increase the expression of transiently transfected genes in K562 cells. Beyond this nonspecific increase in gene expression, hemin induction acts to increase the activity of the lineage limited transcription factor NF-E2. The divergent effects of hemin and TPA on gene expression in K562 cells are mediated, in part, by their contrasting effects on the transcription factor 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