Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinMicrosatellite RepeatsIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidBase SequenceSpinocerebellar AtaxiasMachado-Joseph DiseaseHeredodegenerative Disorders, Nervous SystemPoint MutationMolecular Sequence DataNerve Tissue ProteinsPedigreePolymerase Chain ReactionDNAPolymorphism, GeneticGenomic InstabilityDinucleotide RepeatsMutation, MissenseGenetic MarkersMinisatellite RepeatsFrontotemporal DementiaFlap EndonucleasesPeptidesTandem Repeat SequencesAnticipation, GeneticGenetic VariationSequence Analysis, DNANucleic Acid ConformationIntranuclear Inclusion BodiesAge of OnsetGenotypeInverted Repeat SequencesDNA, SatelliteCerebellar AtaxiaHeterozygoteNeurodegenerative DiseasesNuclear ProteinsGenetic Diseases, InbornModels, GeneticDNA PrimersPhenotypeChromosome FragilityMuscular Dystrophy, OculopharyngealRNA-Binding ProteinsChromosome MappingExonsAmyotrophic Lateral SclerosisGene FrequencyFrameshift MutationGenetic LinkageDNA RepairGenetics, PopulationProteinsGenes, DominantHaplotypesAmino Acid SequenceDNA Mutational AnalysisGenome, HumanMice, TransgenicReceptors, AndrogenSaccharomyces cerevisiaeDNA-Binding ProteinsTranscription, GeneticEvolution, MolecularRepetitive Sequences, Amino AcidMutS Homolog 2 ProteinDNA ReplicationGenetic TestingRecombination, GeneticDisease Models, AnimalCell LineSequence DeletionDNA, PlantRNA, MessengerGerm-Line MutationSaccharomyces cerevisiae ProteinsChromosomes, Human, XMyoclonic Epilepsies, ProgressiveExpressed Sequence TagsFounder EffectNucleic Acid HeteroduplexesPhylogenyGenetic LociTranscription FactorsX ChromosomeMutation RateAtaxiaSpecies Specificity