Some TUNEL positive nuclei were observed in the MYH3+ myofibers in the TA muscles of both non-transplanted and transplanted mice at 4 weeks (Figure 5F), possibly reflecting the specific pathology of UCMD muscles, in which new myofibers during regeneration fail to grow and mature, undergoing apoptosis instead (Paco et al., 2012). The gene discussed is MYH3; the disease is Congenital muscular dystrophy, Ullrich type.