Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsAllelesPolymorphism, GeneticAdenineMutationRepetitive Sequences, Nucleic AcidPolymorphism, Single NucleotideBase SequenceSpinocerebellar AtaxiasMachado-Joseph DiseaseHeredodegenerative Disorders, Nervous SystemMolecular Sequence DataNerve Tissue ProteinsDNAMicrosatellite RepeatsGenomic InstabilityPolymerase Chain ReactionFrontotemporal DementiaFlap EndonucleasesMinisatellite RepeatsAnticipation, GeneticNucleic Acid ConformationPedigreeGene FrequencyTandem Repeat SequencesInverted Repeat SequencesAge of OnsetCerebellar AtaxiaIntranuclear Inclusion BodiesChromosome FragilityGenotypeMuscular Dystrophy, OculopharyngealGenetic Diseases, InbornGenetic Predisposition to DiseaseRNA-Binding ProteinsPhenotypeHaplotypesSequence Analysis, DNAAdenine NucleotidesAmyotrophic Lateral SclerosisNuclear ProteinsNeurodegenerative DiseasesGenetic VariationDNA RepairModels, GeneticGenetic MarkersProteinsDNA PrimersCase-Control StudiesPeptidesHeterozygoteExonsReceptors, AndrogenGenome, HumanMice, TransgenicAmino Acid SequenceGenes, DominantTranscription, GeneticDNA Mutational AnalysisDNA-Binding ProteinsChromosome MappingDNA ReplicationRNA, MessengerMyoclonic Epilepsies, ProgressiveSaccharomyces cerevisiaeNucleic Acid HeteroduplexesMutS Homolog 2 ProteinRepetitive Sequences, Amino AcidPromoter Regions, GeneticDinucleotide RepeatsGenetic LinkageDisease Models, AnimalGenetic TestingChromosomes, Human, X