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Fig. 4. Microphotographs showing the distribution of XTI in cross sections of the late tad pole stages. Levels of cross sections (A-E) are
indicated at right bottom. A: a section through the midbrain of a stage-42 embryo. The XTI is seen in the oculomotor nerves (arrows) and
motoneurons. B-E: cross sections of a stage-47 embryo. B: Mauthner cell and other neurons showing XTI in the rhombencephalon. Inset: higher
magnification of the Mauthner cell. C: the XTI in ganglion cells of cranial nerves IX/X. D: retinal ganglion cells showing XTI (arrows) E: the
XTI seen in motoneurons, dorsal root ganglions and nerve fibers coursing between myotomes (arrows). L, lens; M, myotome: No, notochord; Nt,
neural tube. Scale bars, 100 k~m. |