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Figure Caption
Fig. S1 Wnt8 is not required for BMP signaling activity after gastrulation. Images of anti-phosphorylated Smad1/5 staining at the 5-6-somite stage. Genotypes are indicated above each row. Arrows indicate tail domain where nuclear P-Smad1/5 indicates active BMP signaling. Lateral views, dorsal right, anterior up. Note absence of staining in tailbud of wnt8 morphant (B), elevated staining in chordin morphant (C), and strong staining in wnt8;chordin double morphant (D).
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