C9orf72 and amyotrophic lateral sclerosis: It is also known that in some ALS/FTD cases, mRNA and abnormally translated dipeptide repeat protein by repeat-associated non-ATG translation are deposited in neurons due to abnormal expansion of the hexanucleotide repeat sequence in the untranslated region of the C9orf72 gene (DeJesus-Hernandez et al., 2011; Renton et al., 2011; Mori et al., 2013).