Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidBase SequenceMolecular Sequence DataSpinocerebellar AtaxiasMachado-Joseph DiseaseHeredodegenerative Disorders, Nervous SystemNerve Tissue ProteinsDNAGenomic InstabilityFrontotemporal DementiaFlap EndonucleasesMicrosatellite RepeatsAnticipation, GeneticNucleic Acid ConformationPedigreeInverted Repeat SequencesTandem Repeat SequencesMinisatellite RepeatsPolymerase Chain ReactionAge of OnsetCerebellar AtaxiaIntranuclear Inclusion BodiesRNA-Binding ProteinsChromosome FragilityMuscular Dystrophy, OculopharyngealAmino Acid SequenceGenetic Diseases, InbornNuclear ProteinsPolymorphism, GeneticAmyotrophic Lateral SclerosisProteinsPhenotypeSequence Analysis, DNANeurodegenerative DiseasesRNA, MessengerTranscription, GeneticPeptidesDNA PrimersDNA RepairMice, TransgenicModels, GeneticReceptors, AndrogenDNA-Binding ProteinsGenotypeSaccharomyces cerevisiaeCell LineExonsGenes, DominantDNA ReplicationGenome, HumanGenetic MarkersChromosome MappingSaccharomyces cerevisiae ProteinsHeterozygoteRepetitive Sequences, Amino AcidMyoclonic Epilepsies, ProgressiveGenetic VariationNuclear Localization SignalsDisease Models, AnimalMutS Homolog 2 ProteinCell NucleusPromoter Regions, GeneticCloning, MolecularNucleic Acid HeteroduplexesTranscription FactorsRNAGene ExpressionGene FrequencyBrainDNA Mutational AnalysisSequence Deletion