Figure 3A. Copyright: Reprinted with permission from Elsevier from [doi:10.1016/S0925-4773(01)00288-X] Mech Dev 102: 219-22, Nunes M; Blanc I; Maes J; Fellous M; Robert B; McElreavey K, NSPc1, a novel mammalian Polycomb gene, is expressed in neural crest-derived structures of the peripheral nervous system. Copyright 2001.