Myo10 expression in postnatal regenerative myogenesis was examined in the muscle sections from the mdx mouse, a mouse model of Duchenne muscular dystrophy (DMD) that continuously displays regions of stable, damaged, and regenerating muscle fibers within the same muscle section, due to loss of dystrophin (Hoffman et al., 1987; Petrof et al., 1993). This evidence concerns the gene DMD and Duchenne muscular dystrophy.