Spastic paraplegia 9 (autosomal dominant) is a protein that in humans is encoded by the SPG9 gene.
Further reading
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Seri M, Cusano R, Forabosco P, Cinti R, Caroli F, Picco P, Bini R, Morra VB, De Michele G, Lerone M, Silengo M, Pela I, Borrone C, Romeo G, Devoto M (February 1999). "Genetic mapping to 10q23.3-q24.2, in a large Italian pedigree, of a new syndrome showing bilateral cataracts, gastroesophageal reflux, and spastic paraparesis with amyotrophy". American Journal of Human Genetics. 64 (2): 586–93. doi:10.1086/302241. PMC 1377769. PMID 9973297.
