Expression of cadherin mRNA expression in the APHl 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 cell clusters. Dashed lines indicate the division between subregions and layers. Scale bar=250 μm.