Figure 2. Wnt gene expression patterns in the chick prosencephalon: Wnt1 (A–C), Wnt2b (D–F), Wnt3a (G–I), Wnt8b (J–L), and Wnt5a (M–O) at HH10 (A, D, G, J, M), HH15 (B, E, H, K, N), and HH23 (C, F, I, L, O). Dorsal views (A, D, G, J, M) and lateral views (B, C, F, E, H, I, K, L, N, O) of whole-mount neural tube are shown. Dot lines mark the prospective ZLI. Green circles in A, D, G, J, and M indicate where a Dkk-1-soaked bead was implanted in bead-implanting experiments. Di, Diencephalon; Tel, telencephalon; Mes, mesencephalon.