To access the data, click or select the words “Appendix 2.” This will initiate the download of a compressed (pdf) archive that contains the file. Immunolabeling for AP2α (A, B) or islet-1 (C, D) was performed on 30-day regenerated retinas of stages 51–54 tadpoles (exposed to FGF-2; A, C) and on intact retinas of stage 46 tadpoles (B, D). Notice the similar distribution of the labeled cells. Abbreviations: ganglion cell layer (GCL); inner nuclear layer (INL); outer nuclear layer (ONL). Scale bar in D represents 100 μm and applies to all panels.