PDX1 and cancer: Notably, these findings, using KPC;YFP (LSL‐KrasG12D/+;Trp53R172H/+;Pdx1‐Cre;R26LSL‐YFP) mice employing lineage‐traced cancer cells (Zheng et al, 2015), were validated using the additional mesenchymal markers such as Fsp1, Zeb1, and vimentin (Appendix Fig S1).