200XRFMR-2 proteinDystrophia myotonica (DM)19ql3.2-q13.3CTG5-30/200-1000AD, variable penetranceMyotonin protein kinaseHuntington disease (H D)4pl6.3CAG6-34/37-180ADHuntingtonSpinocerebellar ataxia type 1 (SCA1)6p213-21.2CAG6-39/40-88ADAtaxin 1Spinocerebellar ataxia type 2 (SCA2)12q24.1 ACAG15-31/34-400ADAtaxia 2Spinocerebellar ataxia type 3 (SCA3); Machado Joseph disease (MD)14q21CAG13-36/55-86ADAtaxin 3Spinocerebellar ataxia type 6 (SCA6, CACNAIA)I9pl 3.1-13.2CAG4-16/20-33ADAlpha 1A voltage- dependent L-type calcium channelSpinocerebellar ataxia type 7 (SCA7)3p21.1-pl2CAG4-19/37 to >300ADAtaxin 7Spinocerebellar ataxia type 12 (SCA12)5q31CAG26/66-78ADProtein phosphatase 2 ADentorubral pallidoluysiane atrophy (DRPLA)12pCAG7-23/49-75ADAtnopbin 1Friedreich ataxia (FRDA1)9ql3-21GAA7-22/200-900ARFrataxinNote: AD, autosomal dominant; AR, autosomal recessive; XR. X-linked recessive.">