FOXG1 and colorectal carcinoma: At E12.5, Tbr2 is expressed, in controls, by INP in the DNE and in CR cells towards the pia (figure 4a); in the FoxG1-Cre cKO mutant, whereas Tbr2 expression in CRC (towards the pia, arrow) appears present, expression in the DNE is not detected (figure 4a).