Fig. 6. Expression patterns of Smed-netrin1 and netrin2 in intact and regenerating CNS visualized by whole-mount in-situ hybridization. (A-D) Expression of Smed-netrin1 (A,B) and netrin2 (C,D) in intact animals. Expression of Smed-netrin2 during anterior regeneration: (E) 2 days; (F) 3 days; (G) 10 days. Arrowheads in F point to positive cells within the blastema. (A-D) Anterior to the left. (E-G) Anterior to the top. Scale bars: 500 µm in A,C; 100 µm in B,D; 100 µm in E-G.