Fig. 5
From: Limb patterning genes and heterochronic development of the emu wing bud
Expression of genes associated with limb bud outgrowth (Fgf10, Fgf8, Wnt2b) in emu versus chicken embryos (stages 18, 19, 22 and 23). a Fgf8 is expressed in the AER of both species, but in a smaller domain in emu forelimb bud, due to the delayed growth and smaller size of the limb bud. b, c Similarly, Fgf10 and Wnt2 show reduced domains in the emu forelimb bud