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Fig. 7. Injection of chordin or of Smad7 mRNA cannot induce expression of the dorsal telencephalic markers Xemx1 and eomes in animal cap assays. Animal caps from stage 9 embryos injected with 600 pg chordin mRNA (A-D), or with 200 pg Smad7 mRNA (E-H), or from uninjected embryos (I-L) were dissected, grown in pairs to stage 30/31 and assayed for expression of Xrx1, Xemx1, eomes and XK81 as indicated. (I-L) are uninjected control caps.





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