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Fig. 1. Developmental expression of XRAR{alpha}. Whole-mount in situ hybridization was performed on embryos from stage 9 to stage 25 using a probe that recognizes all isoforms of XRAR{alpha}. (A) Dorsal (left) and ventral (right) view of a stage 9 embryo. (B,D,F,H,J) Frontal views. (C) A dorsal view of the stage 10 embryo. (E) A vegetal view of the stage 10 embryo. Note the sharp anterior border of strong staining.