This approach also worked for (GAA)n.(TTC)n, (CCTG)n-(CAGG)n, and (ATTCT)n.(AGAAT)n tracts associated with Friedreich ataxia, DM2, and spinocerebellar ataxia type 10, respectively.
Alu elements are known to be the source of microsatellite repeats responsible for two other repeat expansion disorders: Friedreich ataxia and spinocerebellar ataxia type 10.