Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidBase SequenceSpinocerebellar AtaxiasMachado-Joseph DiseaseMolecular Sequence DataHeredodegenerative Disorders, Nervous SystemNerve Tissue ProteinsGenomic InstabilityDNAFrontotemporal DementiaFlap EndonucleasesMicrosatellite RepeatsAnticipation, GeneticNucleic Acid ConformationInverted Repeat SequencesPedigreeTandem Repeat SequencesMinisatellite RepeatsAge of OnsetCerebellar AtaxiaIntranuclear Inclusion BodiesPolymerase Chain ReactionChromosome FragilityMuscular Dystrophy, OculopharyngealRNA-Binding ProteinsGenetic Diseases, InbornPolymorphism, GeneticAmyotrophic Lateral SclerosisNuclear ProteinsNeurodegenerative DiseasesSequence Analysis, DNAPhenotypeProteinsPeptidesAmino Acid SequenceTranscription, GeneticDNA RepairMice, TransgenicModels, GeneticDNA PrimersReceptors, AndrogenGenotypeRNA, MessengerExonsDNA-Binding ProteinsGenes, DominantDNA ReplicationSaccharomyces cerevisiaeGenome, HumanMyoclonic Epilepsies, ProgressiveHeterozygoteGenetic MarkersRepetitive Sequences, Amino AcidGenetic VariationMutS Homolog 2 ProteinNucleic Acid HeteroduplexesDisease Models, AnimalGene FrequencyPromoter Regions, Genetic