Fig 1D Sefton et al, 2000 [PMID:11044616] Copyright: Reprinted with permission from Elsevier from [doi:10.1016/S0925-4773(00)00441-X] Mech Dev 98: 127-31, Sefton M; Blanco MJ; Penela P; Mayor F; Nieto MA, Expression of the G protein-coupled receptor kinase 2 during early mouse embryogenesis Copyright 2000