ZEB1 and cancer: Notably, phospholipid species containing PUFAs, including the ferroptosis-relevant PE(18:0_20:4) and PE(18:0_22:4), as well as the PUFA:MUFA ratio were highly enriched in Zeb1high mesenchymal-type cancer cells (MDA-MB-231 and KPCm), but reduced upon Zeb1 depletion, as well as in epithelial (KPCe) cancer cells (Fig. 2c and Extended Data Fig. 3a).