Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidSpinocerebellar AtaxiasMachado-Joseph DiseaseBase SequenceHeredodegenerative Disorders, Nervous SystemNerve Tissue ProteinsGenomic InstabilityMolecular Sequence DataFrontotemporal DementiaFlap EndonucleasesMicrosatellite RepeatsAnticipation, GeneticDNANucleic Acid ConformationInverted Repeat SequencesMinisatellite RepeatsTandem Repeat SequencesPedigreeCerebellar AtaxiaAge of OnsetIntranuclear Inclusion BodiesChromosome FragilityMuscular Dystrophy, OculopharyngealGenetic Diseases, InbornPolymerase Chain ReactionRNA-Binding ProteinsAmyotrophic Lateral SclerosisPolymorphism, GeneticNeurodegenerative DiseasesNuclear ProteinsPhenotypePeptidesProteinsDNA RepairSequence Analysis, DNAReceptors, AndrogenModels, GeneticMice, TransgenicGenotypeDNA PrimersGenome, HumanGenes, DominantDNA ReplicationMyoclonic Epilepsies, ProgressiveTranscription, GeneticDisease Models, AnimalMutS Homolog 2 ProteinGenetic MarkersHeterozygoteExonsRepetitive Sequences, Amino AcidSaccharomyces cerevisiaeNucleic Acid HeteroduplexesRNA, MessengerDNA-Binding ProteinsAmino Acid SequenceGenetic VariationGene Frequency