1K views · 17 reactions | Superoxide dismutase 1 (SOD1) amyotrophic lateral sclerosis (ALS) progressively robs people of their ability to move, speak, swallow and breathe. It is a rare, genetic form of the disease that makes up about 2% of global ALS cases. Learn more about the role of the SOD1 gene mutation in ALS. | Biogen | Facebook