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Expression of 5′Hoxd genes in Hoxa13−/− limb bud. Embryonic day (E) 10.5 forelimb buds hybridized with Hoxd10 (A,D), Hoxd11 (B,E), and Hoxd13 (C,F). Note that the phase one expression of 5′Hoxd genes is unaltered in absence of Hoxa13. Genotypes are indicated on the left.
