Fig1E.Copyright: Reprinted with permission from Elsevier from [doi:10.1016/S0925-4773(97)00174-3] Mech Dev 69: 215-8, Nikolova M; Chen X; Lufkin T, Nkx2.6 expression is transiently and specifically restricted to the branchial region of pharyngeal-stage mouse embryos Copyright 1997.