AhR agonists induce CYP1B1 target gene expression in human iPSCs and HPs. (A) Western blot analysis for AhR and β-actin protein expression in iPSCs and HPs. (B) Quantitative PCR data of iPSCs and day 15 HPs with and without 0.2 μm of FICZ for 3 days. Expression is normalized to β-actin levels. Data are the average of 3 independent experiments ± SD: *P < .05, **P < .005 (supplemental Figure 2).