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Fig. 3 (Right) . Whole mount in situ hybridization analysis of Xenopus paraxis mRNA expression. (A-D) Dorsal view. (E) Lateral view. All embryos are oriented with anterior to the left. (A) At stage 13, paraxis expression is in the presomitic mesoderm. (B) At stage 17, paraxis expression is reduced in the anterior region where somitogenesis begins. (C) At stage 19, paraxis becomes progressively more reduced in the anterior paraxial mesoderm. (D) At stage 24, paraxis transcripts are present at high levels only in the most caudal region where the somites are not yet compartmentalized. (E) At stage 28, paraxis expression is strong in the tip of the tail and in the dorsal half of somites from mid-trunk to hind-trunk. |
