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Figure Caption
Fig. 2 SB-431542 rapidly blocks transcription of Nodal target genes. lefty1 expression in embryos treated with DMSO (A-C) or SB-431542 (D-F) at 4.3 h (dome stage), and fixed after 15 minutes (A, D), 30 minutes (B, E) or 45 minutes (D, F).
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Full text @ BMC Dev. Biol.