Fig. 7. Absence of ectopic marker gene expression in Sox9^loxP/loxP, Sox10^lacZ/lacZ, Sox10::Cre spinal cords. In co-immunohistochemistry on transverse spinal cord sections from the forelimb region of Sox9^loxP/loxP, Sox10^lacZ/lacZ, Sox10::Cre (Sox9^/ Sox10^-/-) embryos at 15.5 dpc (A-C) and 18.5 dpc (D-F). OLPs were identified by Olig2 (A,B,D,E) or β-galactosidase (C,F) expression (in green), and analyzed for the simultaneous occurrence of the cell-type specific markers (in red) NeuN (A,D), Glast (B,E) and B-FABP (C,F). Nuclei were counterstained with DAPI.