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Fig. S3 Convergent and extension movements of the mesoderm and ectoderm are not affected by S1pr2/Gα13 signaling during zebrafish gastrulation. (A-C) Expression of ntl, as detected by in situ hybridization, at 90% epiboly (9 hpf). Dorsal view. (D-F′) Expression of hgg1 (marks prechordal plate, red), dlx3 (neural plate boundary), krox20 (rhombomeres 3 and 5), shh (midline) and deltaC (somites) detected by in situ hybridization, at the 3- to 4-somite stage (12 hpf). (D-F) Dorsoanterior view; (D′-F′) dorsal view; *, notochord; white line with double arrows indicate neural plate (np). Scale bars: 100 μm.