SOD1 and amyotrophic lateral sclerosis: To date, nearly 30 genes have been implicated in ALS pathogenesis, including chromosome 9 open reading frame 72 (C9orf72), copper/zinc superoxide dismutase (SOD1), transactive response (TAR) DNA‐binding protein 43 (TDP‐43), and fused in sarcoma (FUS) [1].