DSG1 and autosomal recessive limb-girdle muscular dystrophy type 2F: Based on previous reports, defects in the δ-SG gene seem to be unique and highly heterogeneous among DGC genes: 1) Six different LGMD-2F-causing mutations (E93X, A131P, R165X, E262K, c.656C, and W30X) demonstrated to be free of cardiac abnormalities [21, 30–33].