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Fig. 5. The notochord and pre- chordal plate in the late gas- trula. (A,A X. laevis. (A) Late gastrula in whole mount. (A Sagittal section through the notochord and prechordal plate. (B,B E. randi. (B) Late gastrula in whole mount. (B Sagittal section through the notochord and prechordal plate. (C,C C. machalilla. (C) Late gastrula in whole mount. (C Sagittal sec- tion through the notochord and prechordal plate. (D-D) G. riobambae. (D) Embryo in whole mount. (D Higher magnifica- tion of the notochord from the embryo shown in D. (D) Sagit- tal section through the noto- chord from the embryo shown in D. The drawings outline the
Lim1 signal in black. The down regulation of the protein Lim1 in the prechordal plate of C. machalilla is shown in gray. Abbreviations: a, archenteron; n, notochord; p, pronephros; pp, prechordal plate. Scale bars: 400 μm (C); 300 μm (D,D); 200 μm (ABC; 100 μm (A,B,D. |