Fig3A. Copyright: Reprinted with permission from Elsevier from [doi:10.1016/j.ydbio.2007.02.014] Dev Biol 305: 333-46, Liu Z; Yu S; Manley NR, Gcm2 is required for the differentiation and survival of parathyroid precursor cells in the parathyroid/thymus primordia. Copyright 2007