Expression of cadherin mRNA expression in the APHcl of developing chicken embryos at E14 and E18. (A, B) Cdh2. (C, D) Cdh4. (E, F) Cdh6B. (G, H) Cdh7. (I, J) Cdh8. (K, L) Cdh11. (M, N) Pcdh1. (O, P) Pcdh7. (Q, R) Pcdh8. (S, T) Pcdh9. (U, V) Pcdh10. (W, X) Pcdh17. (Y, Z) Pcdh19. S, the superficial layer; C, the cortical plate; PV, the periventricular layer. Arrowheads indicate the scattered cells. Dashed lines indicate the division between subregions and layers. The asterisks indicate artefacts. Scale bar=250 μm.