“…Transition genes expressed highly in the branch include CEBPG, POU3F1, POU3F2, NR2F1, NR2F2, ARX, LIN28A, TOX3, ZBTB20, PROX1 , and SOX15 which have been previously implicated in proliferation of forebrain progenitors (Au et al, 2013; Borello et al, 2014; Cimadamore et al, 2013; Dominguez et al, 2013; Yang et al, 2015) and the migratory behaviors of ganglionic eminences (Kanatani et al, 2008; Kessaris et al, 2014; Lodato et al, 2014; Olivetti and Noebels, 2012; Reinchisi et al, 2012). The transition genes include DMRTA1, HES1, HES5, FOXG1, PAX6, HMGA2, SOX2, SOX3, SOX9, SOX6, SP8, OTX2, TGIF, ID4, SOX3, TCF7L2 , and TCFL1 which are known to be expressed in forebrain progenitors of the developing neocortex, thalamus, and hypothalamus (Abraham et al, 2013; Pozniak et al, 2010; Shimojo et al, 2011; Tzeng and de Vellis, 1998; Wang et al, 2006), and are known to establish dorsal forebrain regional identity; (Azim et al, 2009; Bani-Yaghoub et al, 2006; Borello et al, 2014; Gaston-Massuet et al, 2016; Hagey et al, 2014; Hutton and Pevny, 2011; Johansson et al, 2013; Kikkawa et al, 2013; Kishi et al, 2012; Manuel et al, 2011; Miyoshi and Fishell, 2012; Ohtsuka et al, 2001; Ross et al, 2003; Shen and Walsh, 2005; Sur and Rubenstein, 2005; Yang et al, 2015; Zembrzycki et al, 2007). …”