It has been illustrated that MEIS1 silencing in mouse embryonic carcinoma suppressed differentiation in neural cells, while its ectopic expression induced differentiation via expression of neural progenitor markers including GLAST, BLBP, SOX1, and Nestin (Yamada, Urano‐Tashiro, Tanaka, Akiyama, & Tashiro, 2013). This evidence concerns the gene SOX1 and embryonal carcinoma.