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Fig. 6. Nasonia Hunchback in serosa and nervous system of wild-type embryos. (A) A dorsal stripe of mRNA expression initiates shortly before gastrulation. (B) Protein expression in the nuclei of the developing serosa, soon after germ-band extension. (C,D) Continued protein expression in the serosa as it begins to expand to envelop the entire embryo. (E) Protein expression in the nervous system, seen here during head involution. (F) Ventral view of embryo shown in E.