Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsAllelesPolymorphism, GeneticMutationRepetitive Sequences, Nucleic AcidPolymorphism, Single NucleotideSpinocerebellar AtaxiasBase SequenceMachado-Joseph DiseaseHeredodegenerative Disorders, Nervous SystemMolecular Sequence DataNerve Tissue ProteinsMicrosatellite RepeatsDNAGenomic InstabilityPolymerase Chain ReactionFrontotemporal DementiaFlap EndonucleasesMinisatellite RepeatsAnticipation, GeneticPedigreeGene FrequencyTandem Repeat SequencesNucleic Acid ConformationInverted Repeat SequencesAge of OnsetCerebellar AtaxiaIntranuclear Inclusion BodiesChromosome FragilityMuscular Dystrophy, OculopharyngealGenotypePhenotypeGenetic Diseases, InbornGenetic Predisposition to DiseaseHaplotypesRNA-Binding ProteinsSequence Analysis, DNAAmyotrophic Lateral SclerosisNuclear ProteinsGenetic VariationNeurodegenerative DiseasesModels, GeneticGenetic MarkersProteinsDNA RepairPeptidesDNA PrimersCase-Control StudiesHeterozygoteMice, TransgenicExonsReceptors, AndrogenGenome, HumanGenes, DominantAmino Acid SequenceDNA Mutational AnalysisDNA-Binding ProteinsTranscription, GeneticChromosome MappingRNA, MessengerMyoclonic Epilepsies, ProgressiveDNA ReplicationRepetitive Sequences, Amino AcidMutS Homolog 2 ProteinDisease Models, AnimalSaccharomyces cerevisiaeNucleic Acid HeteroduplexesPromoter Regions, GeneticDinucleotide RepeatsGenetic LinkageGenetic TestingChromosomes, Human, X