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Figure 3. Sagittal sections through the forebrain of Xenopus at premetamorphic larval stages (stages 44–49), hybridized from xTbr1 (A,B), xEmx1 (E,F), or xDll4 (C,D). Note the general expression of xTbr1 and xEmx1 in the pallium and developing mitral cell layer of the olfactory bulb. The expression of these genes in the pallium is complementary to that of xDll4 in the subpallium (C,D). A few scattered cells expressing xTbr1 or xEmx1 are observed in the subpallial mantle (B,F). In the olfactory bulb, the majority of the cells in the internal granular layer (igl) and some cells in the glomerular layer (gl) express xDll4. Caudally, the eminentia thalami (ET) appears as a distinct domain located rostrodorsal to the ventral thalamus (VT), rich in xTbr1 (A) but poor in xDll4 (C). See text for more details. For abbreviations , see list. Scale bar = 50 μm in A (applies to all). |
