Skip to main content
. 2023 Jun 16;11:1208279. doi: 10.3389/fcell.2023.1208279

FIGURE 2.

FIGURE 2

Gsc:Cyp26A1-eGFP is expressed in embryoid bodies induced with activin A and fibroblast growth factor (FGF). (A) Embryoid body (EB) formation was used to generate definitive endoderm germ cells in vitro. Activin A and FGF-2 were used to induce Gsc gene expression, including Cyp26A1-eGFP expression from the targeted Gsc allele. Results clearly demonstrate Gsc:Cyp26A1-eGFP is inducible under these conditions by eGFP expression in Activin A treated cells (middle panels), but not in untreated or EBs generated from wild-type ES cells (left and right panels, respectively). ES cell clones used to generate EBs are identified (C2, H4, G12). (B) Sox17 immunocytochemistry was performed on embryoid bodies to confirm definitive endoderm cell induction (Sox 17). Nuclear staining (DAPI) and overlay (MERGE) are shown. Scale bars: 200 um (A); 40 um (B).