Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinMicrosatellite RepeatsAllelesIron-Binding ProteinsPolymorphism, GeneticRepetitive Sequences, Nucleic AcidMutationBase SequencePolymorphism, Single NucleotideMolecular Sequence DataSpinocerebellar AtaxiasTandem Repeat SequencesMachado-Joseph DiseasePolymerase Chain ReactionDNAHeredodegenerative Disorders, Nervous SystemGenetic MarkersGenetic VariationGene FrequencyDinucleotide RepeatsMinisatellite RepeatsDNA, SatelliteNerve Tissue ProteinsGenomic InstabilityPedigreeGenotypeSequence Analysis, DNAHaplotypesFrontotemporal DementiaFlap EndonucleasesAnticipation, GeneticNucleic Acid ConformationInverted Repeat SequencesAge of OnsetModels, GeneticChromosome MappingCerebellar AtaxiaDNA PrimersGenetic Predisposition to DiseasePhenotypeGenetic Diseases, InbornIntranuclear Inclusion BodiesChromosome FragilityMuscular Dystrophy, OculopharyngealHeterozygoteRNA-Binding ProteinsGenetics, PopulationGenetic LinkageGenome, HumanNuclear ProteinsAmyotrophic Lateral SclerosisAmino Acid SequenceDNA RepairNeurodegenerative DiseasesEvolution, MolecularExonsProteinsCase-Control StudiesPeptidesDNA, PlantTranscription, GeneticPhylogenyRecombination, GeneticReceptors, AndrogenDNA Mutational AnalysisDNA-Binding ProteinsRepetitive Sequences, Amino AcidGenes, DominantMice, TransgenicDNA ReplicationPromoter Regions, GeneticMutS Homolog 2 ProteinSpecies SpecificityLinkage DisequilibriumSaccharomyces cerevisiaeRNA, MessengerGenetic LociExpressed Sequence TagsMyoclonic Epilepsies, ProgressiveChromosomes, Human, XGenetic TestingX ChromosomeNucleic Acid HeteroduplexesSequence DeletionIntronsCloning, MolecularBlotting, SouthernDisease Models, AnimalDNA, FungalCell Line