Trinucleotide Repeat ExpansionTrinucleotide RepeatsHuntington DiseaseFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeFragile X Mental Retardation ProteinMicrosatellite RepeatsIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidBase SequenceNerve Tissue ProteinsSpinocerebellar AtaxiasMachado-Joseph DiseaseMolecular Sequence DataGenetic MarkersHeredodegenerative Disorders, Nervous SystemPedigreeDNAPolymorphism, GeneticGenomic InstabilityDinucleotide RepeatsAge of OnsetMinisatellite RepeatsPolymerase Chain ReactionGenetic LociFrontotemporal DementiaFlap EndonucleasesTandem Repeat SequencesGenetic VariationAnticipation, GeneticChromosome MappingGenotypeNucleic Acid ConformationNuclear ProteinsInverted Repeat SequencesDNA, SatelliteGenetic Diseases, InbornPhenotypeSequence Analysis, DNAModels, GeneticCerebellar AtaxiaGenetic LinkageNeurodegenerative DiseasesIntranuclear Inclusion BodiesChromosome FragilityMuscular Dystrophy, OculopharyngealHeterozygoteGene FrequencyRNA-Binding ProteinsPeptidesDNA PrimersMice, TransgenicGenetics, PopulationHaplotypesAmyotrophic Lateral SclerosisGenome, HumanDisease Models, AnimalProteinsDNA RepairChromosomes, Human, Pair 4Genetic TestingExonsGenes, DominantEvolution, MolecularReceptors, AndrogenDNA, PlantBrainRecombination, GeneticTranscription, GeneticMutS Homolog 2 ProteinQuantitative Trait LociAmino Acid SequenceDNA ReplicationSaccharomyces cerevisiaeExpressed Sequence TagsDNA-Binding ProteinsMyoclonic Epilepsies, ProgressivePhylogenyChromosomes, Human, XDNA Mutational AnalysisGene Knock-In TechniquesRNA, MessengerRepetitive Sequences, Amino AcidNucleic Acid HeteroduplexesX ChromosomeGenetic Predisposition to DiseaseCell LineSpecies Specificity