Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionIntronsSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromePolymorphism, GeneticHuntington DiseaseFragile X Mental Retardation ProteinAllelesPolymorphism, Single NucleotideIron-Binding ProteinsGenotypeMutationRepetitive Sequences, Nucleic AcidBase SequenceSpinocerebellar AtaxiasMachado-Joseph DiseaseMolecular Sequence DataHeredodegenerative Disorders, Nervous SystemNerve Tissue ProteinsMicrosatellite RepeatsDNAPolymerase Chain ReactionGenomic InstabilityPedigreeFrontotemporal DementiaMinisatellite RepeatsFlap EndonucleasesGene FrequencyAnticipation, GeneticNucleic Acid ConformationTandem Repeat SequencesAge of OnsetInverted Repeat SequencesExonsCerebellar AtaxiaGenetic Predisposition to DiseaseRNA-Binding ProteinsHaplotypesIntranuclear Inclusion BodiesSequence Analysis, DNAChromosome FragilityPhenotypeMuscular Dystrophy, OculopharyngealGenetic Diseases, InbornNuclear ProteinsGenetic VariationModels, GeneticAmyotrophic Lateral SclerosisDNA PrimersGenetic MarkersNeurodegenerative DiseasesCase-Control StudiesProteinsDNA RepairHeterozygoteDNA Mutational AnalysisGenome, HumanPeptidesTranscription, GeneticMice, TransgenicReceptors, AndrogenRNA, MessengerDNA-Binding ProteinsPromoter Regions, GeneticAmino Acid SequenceChromosome MappingGenes, DominantDinucleotide RepeatsGenetic LinkageDNA ReplicationMyoclonic Epilepsies, ProgressiveMutS Homolog 2 ProteinSaccharomyces cerevisiaeGenetic TestingRepetitive Sequences, Amino AcidCell LineNucleic Acid HeteroduplexesDisease Models, AnimalSequence DeletionRecombination, GeneticChromosomes, Human, X