Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsAllelesRepetitive Sequences, Nucleic AcidMutationTandem Repeat SequencesSpinocerebellar AtaxiasMachado-Joseph DiseaseBase SequenceHeredodegenerative Disorders, Nervous SystemMolecular Sequence DataNerve Tissue ProteinsGenomic InstabilityMicrosatellite RepeatsMinisatellite RepeatsFrontotemporal DementiaFlap EndonucleasesDNAAnticipation, GeneticNucleic Acid ConformationInverted Repeat SequencesPedigreeCerebellar AtaxiaAge of OnsetIntranuclear Inclusion BodiesChromosome FragilityMuscular Dystrophy, OculopharyngealPolymerase Chain ReactionGenetic Diseases, InbornRNA-Binding ProteinsPolymorphism, GeneticAmyotrophic Lateral SclerosisNeurodegenerative DiseasesNuclear ProteinsPeptidesPhenotypeProteinsDNA RepairSequence Analysis, DNAModels, GeneticReceptors, AndrogenMice, TransgenicGenotypeDNA PrimersAmino Acid SequenceRepetitive Sequences, Amino AcidTranscription, GeneticDNA ReplicationGenome, HumanGenes, DominantMyoclonic Epilepsies, ProgressiveTandem Mass SpectrometryGenetic MarkersExonsSaccharomyces cerevisiaeMutS Homolog 2 ProteinHeterozygoteDNA-Binding ProteinsNucleic Acid HeteroduplexesRNA, MessengerDisease Models, AnimalGenetic VariationGene Frequency