Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidBase SequenceSpinocerebellar AtaxiasPolymerase Chain ReactionMachado-Joseph DiseaseMolecular Sequence DataHeredodegenerative Disorders, Nervous SystemDNANerve Tissue ProteinsGenomic InstabilityFlap EndonucleasesFrontotemporal DementiaMicrosatellite RepeatsNucleic Acid ConformationAnticipation, GeneticInverted Repeat SequencesMinisatellite RepeatsTandem Repeat SequencesPedigreeCerebellar AtaxiaAge of OnsetIntranuclear Inclusion BodiesChromosome FragilityDNA-Directed DNA PolymeraseMuscular Dystrophy, OculopharyngealRNA-Binding ProteinsGenetic Diseases, InbornRNA Polymerase IIPolymorphism, GeneticTranscription, GeneticAmyotrophic Lateral SclerosisNuclear ProteinsNeurodegenerative DiseasesDNA RepairPhenotypeDNA ReplicationSequence Analysis, DNAPeptidesDNA PrimersProteinsModels, GeneticAmino Acid SequenceReceptors, AndrogenGenotypeRNA, MessengerMice, TransgenicSaccharomyces cerevisiaeDNA-Binding ProteinsDNA-Directed RNA PolymerasesDNA Polymerase betaGenes, DominantGenome, HumanExonsMyoclonic Epilepsies, ProgressiveNucleic Acid HeteroduplexesGenetic MarkersHeterozygoteMutS Homolog 2 ProteinDNA Polymerase IRepetitive Sequences, Amino AcidRNASaccharomyces cerevisiae ProteinsCell LineDisease Models, AnimalGene FrequencyPromoter Regions, GeneticGenetic VariationDNA Mutational Analysis