Human skeletal muscle cells are derived from whole muscle that has been dissociated into single cells and frozen. Human skeletal muscle cells are from a single donor. These cells enable researchers to produce various cell types found in skeletal muscle with standard published protocols. Human skeletal muscle cells may be used for various types of in vitro, in vivo, or regenerative medicine studies in normal or diseased systems. In addition, they may be used in muscle development studies. Duchenne Muscular Dystrophy is a recessive X-linked form of muscular dystrophy characterized by rapid progression of muscle degeneration.