(E) Quantitative PCR (qPCR) of SNAI2 (SLUG), VIM and POU3F1 (OCT6) (normalized to GAPDH levels) in MB002 cells stably transduced with EV (set to 1), SOX9-WT and SOX9-T236/240A. Cells were induced for 8 or 24 hours with doxycycline. 