What is the fine-grained topic of the following text: Our results reveal a multistep regulatory process of HSF2 gene expression, In K562 cells undergoing hemin-mediated erythroid differentiation, the increase in HSF2 protein levels is preceded by transcriptional induction of the HSF2 gene, accompanied by increased HSF2 mRNA stability. Only return the topic.
Regulatory process of HSF2 gene expression during erythroid differentiation in K562 cells.