Fragile X syndrome; CGG “cytosine-guanine-guanine” expansions
Huntington’s disease; CAG “cytosine-adenine-guanine” repeat
Friedreich’s ataxia; GAA “guanine-adenine-adenine”expansion
Myotonic dystrophy type 1; CTG “cytosine-thymine-guanine” repeat
Spinocerebellar ataxia type 1; CAG “cytosine-adenine-guanine” repeats
