Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinMicrosatellite RepeatsAllelesIron-Binding ProteinsPolymorphism, GeneticMutationRepetitive Sequences, Nucleic AcidBase SequencePolymorphism, Single NucleotideMolecular Sequence DataSpinocerebellar AtaxiasMachado-Joseph DiseasePolymerase Chain ReactionDNAHeredodegenerative Disorders, Nervous SystemGenetic MarkersGene FrequencyGenetic VariationDinucleotide RepeatsNerve Tissue ProteinsMinisatellite RepeatsGenomic InstabilityPedigreeGenotypeSequence Analysis, DNATandem Repeat SequencesHaplotypesFrontotemporal DementiaFlap EndonucleasesAnticipation, GeneticNucleic Acid ConformationInverted Repeat SequencesAge of OnsetDNA, SatelliteCerebellar AtaxiaDNA PrimersGenetic Predisposition to DiseaseModels, GeneticPhenotypeGenetic Diseases, InbornIntranuclear Inclusion BodiesChromosome MappingChromosome FragilityMuscular Dystrophy, OculopharyngealHeterozygoteRNA-Binding ProteinsGenetics, PopulationGenetic LinkageGenome, HumanAmyotrophic Lateral SclerosisAmino Acid SequenceNuclear ProteinsDNA RepairNeurodegenerative DiseasesExonsProteinsCase-Control StudiesPeptidesDNA, PlantEvolution, MolecularDNA, ComplementaryReceptors, AndrogenExpressed Sequence TagsPhylogenyRNA, MessengerDNA Mutational AnalysisTranscription, GeneticGenes, DominantMice, TransgenicDNA-Binding ProteinsMutS Homolog 2 ProteinLinkage DisequilibriumGenetic LociDNA ReplicationRecombination, GeneticSaccharomyces cerevisiaePromoter Regions, GeneticSpecies SpecificityCloning, MolecularMyoclonic Epilepsies, ProgressiveChromosomes, Human, XGenetic TestingRepetitive Sequences, Amino AcidNucleic Acid HeteroduplexesX ChromosomeCell LineDisease Models, AnimalSequence Deletion