Figure 4A. Copyright: Reprinted with permission from Elsevier from [doi:10.1006/dbio.2002.0596] Dev Biol 244: 96-113, Aubin J; Lemieux M; Moreau J; Lapointe J; Jeannotte L, "Cooperation of Hoxa5 and Pax1 Genes during Formation of the Pectoral Girdle." Copyright 2002 [PMID:11900462]