C. WT and TAX1BP1 KO MEFs were pretreated with 25 μg/ml FAC for 16 h and then cultured with 100 μM Dfo. Lysates were fractionated and then analyzed by immunoblotting with the indicated antibodies. D. Soluble FTL bands in (C) were quantified by densitometry. Data are shown as the means ± SD of three biological replicates. 