Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidSpinocerebellar AtaxiasMachado-Joseph DiseaseHeredodegenerative Disorders, Nervous SystemBase SequenceNerve Tissue ProteinsGenomic InstabilityFrontotemporal DementiaFlap EndonucleasesMolecular Sequence DataAnticipation, GeneticMicrosatellite RepeatsDNANucleic Acid ConformationInverted Repeat SequencesMinisatellite RepeatsTandem Repeat SequencesPedigreeCerebellar AtaxiaAge of OnsetIntranuclear Inclusion BodiesChromosome FragilityMuscular Dystrophy, OculopharyngealGenetic Diseases, InbornRNA-Binding ProteinsPolymerase Chain ReactionAmyotrophic Lateral SclerosisPolymorphism, GeneticNeurodegenerative DiseasesNuclear ProteinsPhenotypePeptidesProteinsDNA RepairSequence Analysis, DNAReceptors, AndrogenModels, GeneticMice, TransgenicGenotypeDNA PrimersGenes, DominantMyoclonic Epilepsies, ProgressiveDNA ReplicationGenome, HumanTranscription, GeneticMutS Homolog 2 ProteinGenetic MarkersRepetitive Sequences, Amino AcidHeterozygoteExonsNucleic Acid HeteroduplexesSaccharomyces cerevisiaeDNA-Binding ProteinsRNA, MessengerDisease Models, Animal