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In situ hybridization of early gastrula-stage embryos injected with CiMRFb mRNA. Embryos shown represent the two most common classes of result we obtained; the percentage of embryos in each class is indicated as are the number of embryos analyzed (N). Embryos in lateral view are oriented with the vegetal half facing left, and animal half facing right. The scale bar is 50 μm. The diagram shows an early gastrula-stage embryo in vegetal view.
