Figure 4

Expression patterns of S. kowalevskii foxN1/4 - Q2 - 3. Spatial expression pattern of S. kowalevskii foxN1/4 - foxQ2-3. Animals are oriented as indicated in cartoons of Figure 2 (1-5) for the corresponding stage if not differently specified. For a detailed description of the expression patterns see text. Panels 4, 6, 29, and 30 show surface views. Panels 14/15 and 23-25 show light stained embryos. For longer stained embryos see Additional file 11: Figure S3. (5) Black arrow points at expression domain of foxN1/4 in the ventral ectoderm at the posterior tip of the trunk, white arrow points at the ciliated band. Inlay shows ventral view of the posterior tip of the trunk, black arrow points at expression domain of foxN1/4. (7-9) White arrows point to cells with high levels of foxP expression in the proboscis ectoderm. An: animal pole; Veg: vegetal pole; L: left; R: right; A: anterior; P: posterior; D: dorsal; V: ventral. Brightness and contrast of pictures were adjusted when appropriate to match overall appearance of the figure.