Fig. 2. Progression of Sox9 deletion in Sox9^loxP/loxP, Sox10::Cre spinal cords. Sox9 immunoreactivity (red) was detected and compared with Sox10 immunoreactivity (green) at 13.5 dpc (A-H) and 14.5 dpc (I-P) in transverse spinal cord sections from the forelimb region of wild-type (A-D,I-L) or Sox9^loxP/loxP, Sox10::Cre (Sox9^/) (E-H, M-P) embryos. Both low-magnification overviews (A,E,I,M) and high-magnifications (B,C,D,F,G,H,J,K,L,N,O,P) are provided. A,B,E,F,I,J,M,N show the Sox9 staining; C,G,K,O show the Sox10 staining; D,H,L,P represent merged pictures.