iPSC lines (Ctr1-iPSCs and Ctr2-iPSCs) generated and fully characterized in our laboratory were used as we previously reported [32 (link)]. FOXA2 knockout iPSCs from Ctr1-and Ctr2-iPSCs were generated using CRISPR/Cas9 as we recently reported [5 (link)]. Both wild-type (WT) and FOXA2–/– iPSCs were cultured and maintained using Stemflex media (ThermoFisher Scientific) on Matrigel-coated plates (Corning). iPSC lines were differentiated into PPs using our established protocol (Supplementary Table 1) [33 (link)–35 (link)].
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