Figure 4C. Copyright: Reprinted with permission from Elsevier from [doi:10.1016/0925-4773(96)00582-5] Mech Dev 59: 73-87, Koop KE; MacDonald LM; Lobe CG, Transcripts of Grg4, a murine groucho-related gene, are detected in adjacent tissues to other murine neurogenic gene homologues during embryonic development. Copyright 1996.