Figure 8A. Copyright: Reprinted with permission from Elsevier from [doi:10.1016/0925-4773(96)00525-4] Mech Dev 57: 33-45, Adams RH; Betz H; Puschel AW, A novel class of murine semaphorins with homology to thrombospondin is differentially expressed during early embryogenesis. Copyright 1996.