The effect of BMP2 knockdown on the expression of topographic molecules along the N-T axis. A horizontal section in situ hybridization of control retinas (left) and RCASDC-CU6/BMP2-electroporated retinas (right) of E8 embryos is shown. The expression of FoxG1 (A), FoxD1 (B), SOHo1 (C), GH6 (D), ephrin-A5 (F), and EphA3 (G) was not changed. In contrast, the expression of ephrin-A2 (E) was induced all over the retina. The results of BMP2 knockdown in this and Figure 2 are summarized in H.