J:47699 Pabst O, et al., Nkx2-9 is a novel homeobox transcription factor which demarcates ventral domains in the developing mouse CNS. Mech Dev. 1998 Apr;73(1):85-93

J:59199 Pabst O, et al., NKX2 gene expression in neuroectoderm but not in mesendodermally derived structures depends on sonic hedgehog in mouse embryos. Dev Genes Evol. 2000 Jan;210(1):47-50

J:85847 Kokubu C, et al., Undulated short-tail deletion mutation in the mouse ablates Pax1 and leads to ectopic activation of neighboring Nkx2-2 in domains that normally express Pax1. Genetics. 2003 Sep;165(1):299-307