MGI:104621Homozygotes for a null allele show cranial neural tube and forebrain mesenchyme defects leading to acrania, meroanencephaly, and neonatal lethality. Homozygotes for another null allele die neonatally and display eye morphogenesis defects and craniofacial abnormalities, including frontonasal malformations, notching of the upper lip and cleft palate.