Fig2A. Copyright: Reprinted with permission from Elsevier from [doi:10.1016/j.ydbio.2007.02.035] Dev Biol 305(2): 498-507, Bazzi H; Fantauzzo KA; Richardson GD; Jahoda CA; Christiano AM, The Wnt inhibitor, Dickkopf 4, is induced by canonical Wnt signaling during ectodermal appendage morphogenesis. Copyright 2007 [PMID:17397822]