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Figure Caption

Figure 3—figure supplement 1. Treatment with the BMP inhibitor DMH1 reduces phospho-SMAD1/5/8 staining in embryos Top, vehicle-treated animals and, bottom, BMPi-treated animals showing lateral views of developing muscle segments, identified by asterisks.

Insets show individual nuclei. Photomicrographs for pSMAD-1/5/8-stained embryos were taken at the same exposure settings.

Acknowledgments
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