Figure 2F. Copyright: Reprinted with permission from Elsevier from [doi:10.1016/S0925-4773(98)00241-X] Mech Dev 81: 213-6, de Maximy AA; Nakatake Y; Moncada S; Itoh N; Thiery JP; Bellusci S, Cloning and expression pattern of a mouse homologue of drosophila sprouty in the mouse embryo. Copyright 1999.