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HoxB4 misexpression does not repress nephric duct formation. (A-F) Embryos were electroporated with an empty pCIZ-GFP vector (A-C) or pCIZ-HoxB4-GFP expression vector (D-F) and analyzed by whole-mount in situ hybridization for Lim1 (B,C,E,F). The nephric duct appeared similar under the two conditions. Arrows indicate somite 10. d, nephric duct.
