Fig1C. Copyright: Reprinted with permission from Cell Press from [doi:10.1016/S0896-6273(01)80027-1] Neuron 23: 675-687, Thaler J; Harrison K; Sharma K; Lettieri K; Kehrl J; Pfaff SL, Active suppression of interneuron programs within developing motor neurons revealed by analysis of homeodomain factor HB9. Copyright 1999