Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionIron-Binding ProteinsSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeAllelesHuntington DiseaseFragile X Mental Retardation ProteinMutationRepetitive Sequences, Nucleic AcidSpinocerebellar AtaxiasMachado-Joseph DiseaseBase SequenceHeredodegenerative Disorders, Nervous SystemMolecular Sequence DataNerve Tissue ProteinsMicrosatellite RepeatsGenomic InstabilityFrontotemporal DementiaFlap EndonucleasesDNAAnticipation, GeneticMinisatellite RepeatsPedigreeNucleic Acid ConformationTandem Repeat SequencesInverted Repeat SequencesAge of OnsetPolymorphism, GeneticCerebellar AtaxiaPolymerase Chain ReactionIntranuclear Inclusion BodiesChromosome FragilityMuscular Dystrophy, OculopharyngealGenetic Diseases, InbornRNA-Binding ProteinsPhenotypeGenotypeAmyotrophic Lateral SclerosisNuclear ProteinsNeurodegenerative DiseasesGene FrequencySequence Analysis, DNAHeterozygoteModels, GeneticSaccharomyces cerevisiaeProteinsPeptidesDNA RepairMice, TransgenicDNA PrimersReceptors, AndrogenAmino Acid SequenceGenetic MarkersGenes, DominantGenetic VariationTranscription, GeneticSaccharomyces cerevisiae ProteinsHaplotypesRNA, MessengerExonsGenome, HumanIron-Sulfur ProteinsDNA ReplicationMyoclonic Epilepsies, ProgressiveDisease Models, AnimalDNA-Binding ProteinsMutS Homolog 2 ProteinIronAconitate HydrataseRepetitive Sequences, Amino AcidNucleic Acid HeteroduplexesChromosome MappingCell LineDNA Mutational Analysis