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Figure 7


Fig. 7. Inner lateral cells move as a group laterally to dorsolateral positions. (A) We define inner lateral (IL) cells as cells adjacent to IM cells. (B) Photoactivated IL cell at gastrulation. The midline is indicated by the radial line. (C). The same cell ~5 minutes later is situated just to the right of the midline in the invaginated epithelial tube. Photoactivated fluorescence (red), Neurotactin (green). (D) Two IL clusters photoactivated on either side of the midline. (E-G) Time-point 0' showing clusters internalising. Reconstructed cross-sections through the dotted lines are shown in F and G. (H) Following spreading, the two clusters have migrated to dorsolateral positions at opposite sides of the embryo (arrowheads). Dotted lines in B,D,F,G show the midline. Scale bars: 20 µm in B-E,H; 10 µm in F,G.





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