Suppl. Fig. 2. Rfx genes in situ hybridization. (A) Rfx1 is expressed in the neural tube. Dorsal view. Transverse section view is shown in (B). (C) Rfx1 expression in otic vesicles and kidney. Lateral view, anterior left. (D) The expression of Rfx3 is observed in the neural tube and epidermis. Dorsal view. Transverse section view is shown in panel (E). (F) Rfx3 is expressed in the GRP. (G) Rfx3 is also expressed in otic vesicles and kidney. Lateral view, anterior left. (H) Rfx4 is robustly expressed in the CNS. (K) The expression of Rfx5 in the neural tube.