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Figure Caption
Fig. 4 Development of the eye in living wild-type embryos and embryos injected with shh RNA. Lateral views with rostral to the left. (A,B) 10-12s, wild-type and injected embryos respectively. (C,D) 48 hour, wild-type and injected embryos respectively. The injected embryo has virtually no pigment epithelium and very little neural retina. (E) Comparison of injected (upper) and wild-type (lower) embryos at 3-4 days of development. The arrow indicates the much reduced retina in the injected embryo. Abbreviations: e, eye; o, optic primodium. Scale bars, (A-D) 50 μm; (E) 200 μm.
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