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Figure 2


Fig. 2. Differential modulation of Nkx and Dlx2 expression domains in cavefish embryos. Dlx2 and Nkx gene expression in surface fish (left) and cavefish embryos (right) at indicated stages. (A-D) Dlx2 and Nkx2.2 on in toto lateral views. (E-H) Nkx2.1b in toto (E,F) and on horizontal sections (G,H, orientation indicated in E). The arrow in F and arrowheads in G,H point to larger expression in cavefish SP. (I,J) Nkx2.1a distribution in toto and in transverse sections through the hypothalamus (insets in I and J). Scale bar: 50 µm. hyp, hypothalamus; p3, prosomere 3 (ventral thalamus); po, preoptic region; pal, pallium; SP, subpallium; tel, telencephalon.