Duchenne muscular dystrophy (DMD) is an X-linked recessive disorder caused by loss-of-function mutations in the DMD gene that encodes dystrophin; DMD manifests as progressive multisystem muscular degeneration with a predilection for skeletal, diaphragmatic, and cardiac tissues (Shirokova and Niggli, 2013). The gene discussed is DMD; the disease is Duchenne muscular dystrophy.