Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionFragile X SyndromeSpinocerebellar DegenerationsMyotonic DystrophyFragile X Mental Retardation ProteinHuntington DiseaseIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidSpinocerebellar AtaxiasMachado-Joseph DiseaseBase SequenceHeredodegenerative Disorders, Nervous SystemNerve Tissue ProteinsMolecular Sequence DataMicrosatellite RepeatsGenomic InstabilityDNAFrontotemporal DementiaFlap EndonucleasesAnticipation, GeneticPedigreeMinisatellite RepeatsNucleic Acid ConformationInverted Repeat SequencesTandem Repeat SequencesRNA-Binding ProteinsCerebellar AtaxiaIntranuclear Inclusion BodiesAge of OnsetPolymerase Chain ReactionChromosome FragilityMuscular Dystrophy, OculopharyngealGenetic Diseases, InbornPolymorphism, GeneticGenetic LociPhenotypeAmyotrophic Lateral SclerosisNuclear ProteinsNeurodegenerative DiseasesSequence Analysis, DNAModels, GeneticChromosome MappingGenotypeProteinsGenetic MarkersPeptidesDNA RepairMice, TransgenicReceptors, AndrogenHeterozygoteDNA PrimersGenes, DominantGenome, HumanTranscription, GeneticAtaxiaGenetic LinkageGenetic VariationExonsDNA ReplicationGene FrequencyRNA, MessengerAmino Acid SequenceMyoclonic Epilepsies, ProgressiveDNA-Binding ProteinsDisease Models, AnimalSaccharomyces cerevisiaeMutS Homolog 2 ProteinRepetitive Sequences, Amino AcidChromosomes, Human, XNucleic Acid HeteroduplexesRecombination, Genetic