F9 and P19 embryonal carcinoma cells respond to RA by increasing the levels of DAB2 (Cho et al., 1999; Golenia et al., 2017), and KERATIN 8/18 (Duprey et al., 1985; Krawetz et al., 2011), which we confirmed by immunoblot analysis (Figures 3B,C). This evidence concerns the gene DAB2 and embryonal carcinoma.