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Rack1 is required for CE during gastrulation. (A) The diagrams illustrate the directions of cellular movement during zebrafish gastrulation. (B) Images of live embryos injected with vangl2 MO, rack1 MO, or rack1 MO plus mouse rack1 mRNA and subsequently labeled single blastomere cell with fluorescein dextran at the 32-cell stage. V, ventral; D, dorsal.
