Figure 2H. Copyright: Reprinted with permission from Elsevier from [doi:10.1016/S0925-4773(98)00018-5] Mech Dev 72: 77-88, Qiu M; Shimamura K; Sussel L; Chen S; Rubenstein JL, Control of anteroposterior and dorsoventral domains of Nkx-6.1 gene expression relative to other Nkx genes during vertebrate CNS development. Copyright 1998.