Proteome analysis consisted of skeletal muscle biopsies from patients with confirmed diagnosis of Bethlem Myopathy (BM, n = 5), Ulrich Congenital Muscular Dystrophy (UCMD, n = 8), and Merosin-deficient congenital muscular dystrophy type 1A (MDC1A, n = 5). The gene discussed is LAMA2; the disease is Ullrich congenital muscular dystrophy.