Trinucleotide Repeat ExpansionTrinucleotide RepeatsHuntington DiseaseFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeFragile X Mental Retardation ProteinMicrosatellite RepeatsIron-Binding ProteinsAllelesRepetitive Sequences, Nucleic AcidMutationBase SequenceNerve Tissue ProteinsMolecular Sequence DataSpinocerebellar AtaxiasMachado-Joseph DiseaseTandem Repeat SequencesDNAHeredodegenerative Disorders, Nervous SystemGenetic MarkersPedigreePolymorphism, GeneticDNA, SatelliteGenomic InstabilityDinucleotide RepeatsAge of OnsetPolymerase Chain ReactionMinisatellite RepeatsFrontotemporal DementiaFlap EndonucleasesAnticipation, GeneticNucleic Acid ConformationGenetic VariationNuclear ProteinsInverted Repeat SequencesSequence Analysis, DNAGenetic Diseases, InbornCerebellar AtaxiaGenotypeNeurodegenerative DiseasesChromosome MappingIntranuclear Inclusion BodiesModels, GeneticChromosome FragilityMuscular Dystrophy, OculopharyngealPhenotypeRNA-Binding ProteinsPeptidesDNA PrimersGenetic LinkageHeterozygoteGene FrequencyMice, TransgenicHaplotypesAmyotrophic Lateral SclerosisProteinsGenetics, PopulationAmino Acid SequenceDisease Models, AnimalGenome, HumanDNA RepairEvolution, MolecularGenetic TestingExonsTranscription, GeneticChromosomes, Human, Pair 4DNA, PlantReceptors, AndrogenRepetitive Sequences, Amino AcidBrainDNA ReplicationRecombination, GeneticMutS Homolog 2 ProteinSaccharomyces cerevisiaeGenes, DominantDNA-Binding ProteinsPhylogenyRNA, MessengerMyoclonic Epilepsies, ProgressiveExpressed Sequence TagsChromosomes, Human, XSpecies SpecificityGene Knock-In TechniquesNucleic Acid HeteroduplexesDNA Mutational AnalysisCell LineGenetic LociX Chromosome