Fig 1I Copyright: Reprinted with permission from Elsevier from [doi:10.1016/S0925-4773(01)00339-2] Mech Dev 103: 163-165, Daujat S; Neel H; Piette J, Preferential expression of Mdm2 oncogene during the development of neural crest and its derivatives in mouse early embryogenesis. Copyright 2001