In Belgian Blue and in Chianina cattle breeds, the ATP2A1/SERCA1 gene was found to be implicated in the Congenital Muscular Dystonia 1 (CMD1, a disorder of muscle function caused by defects in the Ca2+ pump) and in the Congenital Pseudomyotonia [23-26]; while the SLC6A5 gene was found to be linked to the Congenital Muscular Dystonia 2 (CMD2) [23]. The gene discussed is SLC6A5; the disease is campomelic dysplasia.