Consequently, transcriptional expression levels of seven genes related to muscle atrophy (Ankrd1, Calm1, Col19a1, Mt2, Myod1, NogoA, and Sln) (Calvo et al., 2012a) were tested in skeletal muscle tissue from SMA mice (Figure 4). The gene discussed is MYOD1; the disease is proximal spinal muscular atrophy.