B Representative images showing co-expression of the stage-specific markers Nestin, Tbr2, Doublecortin (DCX), and Calbindin (all in green), with the β-Galactosidase (β-Gal, red) reporter in 8-week old BATGAL and Axin2LacZ/+ mice. Nuclei are counterstained with DAPI (in blue). Scale bar= 10µm. Insets show a 1.5x magnification of selected cells (position indicated by dashed box). Scale bar= 5µm. 