(K) Heatmap of BRCA1, P21, Bax expression on U2OS cells with expression of wild-type KLF4 or KLF4-Zinc 2-YYR/AAA mutant as well as KLF4-Zinc 2 (Zinc 2 domain deletion) mutant. No difference of BRCA1 expression was measured between expression of wild-type KLF4 or KLF4-Zinc 2-YYR/AAA mutant, while loss of Zinc domain causes drops of BRCA1 expression levels. 