Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsAllelesPhenotypeMutationRepetitive Sequences, Nucleic AcidSpinocerebellar AtaxiasMachado-Joseph DiseaseBase SequenceHeredodegenerative Disorders, Nervous SystemMolecular Sequence DataNerve Tissue ProteinsGenomic InstabilityFrontotemporal DementiaMicrosatellite RepeatsFlap EndonucleasesAnticipation, GeneticDNAPedigreeNucleic Acid ConformationInverted Repeat SequencesMinisatellite RepeatsTandem Repeat SequencesAge of OnsetCerebellar AtaxiaIntranuclear Inclusion BodiesChromosome FragilityMuscular Dystrophy, OculopharyngealPolymerase Chain ReactionGenetic Diseases, InbornRNA-Binding ProteinsPolymorphism, GeneticAmyotrophic Lateral SclerosisNuclear ProteinsNeurodegenerative DiseasesProteinsPeptidesDNA RepairMice, TransgenicSequence Analysis, DNAModels, GeneticGenotypeReceptors, AndrogenDNA PrimersGenes, DominantTranscription, GeneticAmino Acid SequenceHeterozygoteGenome, HumanSaccharomyces cerevisiaeRNA, MessengerDNA ReplicationGenetic MarkersDisease Models, AnimalDNA-Binding ProteinsExonsMyoclonic Epilepsies, ProgressiveMutS Homolog 2 ProteinRepetitive Sequences, Amino AcidNucleic Acid HeteroduplexesGenetic VariationGene FrequencySaccharomyces cerevisiae ProteinsDNA Mutational AnalysisChromosome MappingCell Line