<i>Dlx</i> gene expression during brain development in the catshark.

<p>Target gene name and stage of development are indicated on each panel. Transverse sections through whole-mount hybridized embryos at stage 25, dorsal to the top, at the level of the telencephalon (<b>A–C</b>) or more posterior through the diencephalon (<b>D–F</b>). <i>Dlx1</i>, <i>Dlx2</i> and <i>Dlx5</i> are expressed in scattered cells of the telencephalon (arrowhead in <b>A–C</b>) and of the diencephalon (arrow in <b>A</b> and <b>D–F</b>). Note expression of <i>Dlx1</i> in scattered cells of the head mesenchyme at the mandibular level, interpreted as cranial neural crest cells (cnc). Scale bars: 50 µm.