DUX4 and Menkes disease: Its role in late-onset facioscapulohumeral dystrophy type 1 (FSHD-1), which is the most common autosomal dominant form of MD, was described by Kunkel’s research team, who generated a dux4 injection model (DUX4i) [53] and a dux4 transgenic model (DUX4t) [54].