Trinucleotide Repeat ExpansionTrinucleotide RepeatsFragile X SyndromeFragile X Mental Retardation ProteinFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyHuntington DiseaseIron-Binding ProteinsTripletsAllelesAtaxiaMutationTremorRepetitive Sequences, Nucleic AcidSpinocerebellar AtaxiasBase SequenceMachado-Joseph DiseaseNerve Tissue ProteinsHeredodegenerative Disorders, Nervous SystemIntranuclear Inclusion BodiesPrimary Ovarian InsufficiencyMolecular Sequence DataHeterozygotePedigreeDNAGenomic InstabilityAnticipation, GeneticFlap EndonucleasesNucleic Acid ConformationFrontotemporal DementiaMicrosatellite RepeatsRNA-Binding ProteinsAge of OnsetMinisatellite RepeatsInverted Repeat SequencesTandem Repeat SequencesCerebellar AtaxiaPolymerase Chain ReactionMuscular Dystrophy, OculopharyngealChromosome FragilityGenetic Diseases, InbornPhenotypePregnancy, TripletPolymorphism, GeneticAmyotrophic Lateral SclerosisNeurodegenerative DiseasesModels, GeneticNuclear ProteinsGene Knock-In TechniquesPeptidesProteinsDNA RepairMice, TransgenicRNA, MessengerSequence Analysis, DNAGenetic TestingGenotypeReceptors, AndrogenTranscription, GeneticDisease Models, AnimalChromosomes, Human, XDNA PrimersGene FrequencyDNA Mutational AnalysisDNA ReplicationGenome, HumanGenes, DominantAmino Acid SequenceMyoclonic Epilepsies, ProgressiveHeterozygote DetectionRepetitive Sequences, Amino AcidExonsNucleic Acid HeteroduplexesSaccharomyces cerevisiaeMosaicismGenetic MarkersMutS Homolog 2 ProteinDNA-Binding ProteinsBrain