Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinMicrosatellite RepeatsIron-Binding ProteinsAllelesMutationBase SequenceRepetitive Sequences, Nucleic AcidPoint MutationTandem Repeat SequencesMolecular Sequence DataPedigreeSpinocerebellar AtaxiasPolymerase Chain ReactionMachado-Joseph DiseaseMutation, MissensePolymorphism, GeneticHeredodegenerative Disorders, Nervous SystemDNANerve Tissue ProteinsGenomic InstabilityMinisatellite RepeatsGenetic MarkersDinucleotide RepeatsSequence Analysis, DNAHeterozygoteGenotypeGenetic VariationFrontotemporal DementiaFlap EndonucleasesAnticipation, GeneticNucleic Acid ConformationDNA Mutational AnalysisAge of OnsetPhenotypeExonsInverted Repeat SequencesDNA, SatelliteDNA PrimersCerebellar AtaxiaGenetic Diseases, InbornModels, GeneticChromosome MappingFrameshift MutationIntranuclear Inclusion BodiesChromosome FragilityGene FrequencyRNA-Binding ProteinsMuscular Dystrophy, OculopharyngealNuclear ProteinsAmino Acid SequenceGenetic LinkageAmyotrophic Lateral SclerosisDNA RepairGenes, DominantProteinsHaplotypesGenetics, PopulationGenetic TestingNeurodegenerative DiseasesGenome, HumanPeptidesDNA-Binding ProteinsGerm-Line MutationMutS Homolog 2 ProteinMice, TransgenicTranscription, GeneticEvolution, MolecularSequence DeletionSaccharomyces cerevisiaePolymorphism, Single-Stranded ConformationalReceptors, AndrogenRecombination, GeneticDNA ReplicationRNA, MessengerCell LineDNA, PlantFounder EffectChromosomes, Human, XDisease Models, AnimalRepetitive Sequences, Amino AcidPhylogenyGenetic Predisposition to DiseaseX ChromosomeExpressed Sequence TagsGenetic LociMyoclonic Epilepsies, ProgressiveSaccharomyces cerevisiae ProteinsTranscription FactorsMutation RateNucleic Acid HeteroduplexesTandem Mass SpectrometryPromoter Regions, Genetic