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Fig. 5. Localization of XGrg-4 and XGrg-5 transcripts in early tailbud stage (22). (A–C) High XGrg-4 expression at the pros-mesencephalic boundary (1), at the mes-rhombencephalic boundary (2) and in the rhombencephalon (3). (D–F) High XGrg-5 expression in the prosencephalon (1), in the anterior rhombencephalon (2) and in the posterior rhombencephalon (3). Arrows in A and D: somites. Asterisks in C and F: mesenchyme between the prospective olfactory placodes. ba, branchial arches; opv, optic vesicle; ov, otic vesicle; p, pronephros; pd, pronephric duct; sha, stomodeal-hypophyseal anlage. Embryos are viewed from lateral (A,D), dorsal (B,E) or anterior (C,F). |