EPM2A is a gene that encodes laforin, a phosphatase enzyme involved in glycogen metabolism. Laforin plays a key role in preventing the buildup of abnormal glycogen deposits known as Lafora bodies, which are toxic to neurons. Mutations in EPM2A lead to Lafora disease, a rare and fatal form of progressive myoclonus epilepsy. This highlights the essential role of EPM2A in maintaining neuronal health through metabolic regulation.