MGI:96794Homozygotes for targeted mutations exhibit retarded postnatal growth, muscular dystrophy, reduced fat stores, micrognathy, abnormal dentition, impaired gonadal development, malformed scapulae, hyperkeratosis, and die by 8 weeks of age. Heterozygosity for an atypical progeria syndrome (APS) associated mutation leads to changes in fat distribution, and diet-induced weight gain, insulin resistance, glucose intolerance and hypercholesteremia.