MGI:1931028Homozygous loss of exons 5-8 causes embryonic death. Deletion of exon 13 causes neo- and postnatal lethality, stunted growth, skin, hair and bone defects, tissue hypoplasia and tooth dysgenesis. Mice lacking exons 9-13 show palate and limb defects, aneuploidy, poikiloderma and cancer predisposition.