Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinMicrosatellite RepeatsAllelesIron-Binding ProteinsPolymorphism, GeneticPolymorphism, Single NucleotideMutationRepetitive Sequences, Nucleic AcidBase SequenceSpinocerebellar AtaxiasMolecular Sequence DataMachado-Joseph DiseaseGene FrequencyGenetic MarkersPolymerase Chain ReactionGenotypeGenetic VariationHaplotypesHeredodegenerative Disorders, Nervous SystemDNADinucleotide RepeatsMinisatellite RepeatsNerve Tissue ProteinsGenomic InstabilityPedigreeSequence Analysis, DNATandem Repeat SequencesGenetic Predisposition to DiseaseFrontotemporal DementiaFlap EndonucleasesAnticipation, GeneticNucleic Acid ConformationAge of OnsetInverted Repeat SequencesDNA, SatelliteModels, GeneticPhenotypeCerebellar AtaxiaChromosome MappingGenetic Diseases, InbornDNA PrimersIntranuclear Inclusion BodiesChromosome FragilityHeterozygoteGenetics, PopulationMuscular Dystrophy, OculopharyngealRNA-Binding ProteinsGenome, HumanGenetic LinkageCase-Control StudiesLinkage DisequilibriumAmyotrophic Lateral SclerosisDNA RepairNuclear ProteinsNeurodegenerative DiseasesExonsProteinsPeptidesGenetic LociEvolution, MolecularDNA Mutational AnalysisDNA, PlantReceptors, AndrogenGenes, DominantExpressed Sequence TagsPhylogenyMice, TransgenicMutS Homolog 2 ProteinDNA-Binding ProteinsTranscription, GeneticRecombination, GeneticDNA ReplicationAmino Acid SequencePromoter Regions, GeneticGenetic TestingChromosomes, Human, XRNA, MessengerSaccharomyces cerevisiaeMyoclonic Epilepsies, ProgressiveSpecies SpecificityGenetic Association StudiesRepetitive Sequences, Amino AcidNucleic Acid HeteroduplexesDisease Models, AnimalX ChromosomeGenome-Wide Association StudySequence Deletion