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Figure 3. Expression of XenopusDlx3 and Msx1 at late gastrula. In situ hybridization was performed by using stage 12, whole fixed albino embryos. Anterior view, with dorsal side on top and ventral side on the bottom. Dlx3 expression extends more dorsally than does Msx1 expression. Note: BMP activity levels are higher in the ventral ectoderm than in the dorsal ectoderm, because anti-BMP antagonists (chordin, noggin, and follistatin) are secreted from the dorsal mesoderm. From Feledy et al., 1999b, with permission of Academic Press. |
