Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinMicrosatellite RepeatsIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidBase SequenceSpinocerebellar AtaxiasPoint MutationMolecular Sequence DataPedigreeMachado-Joseph DiseaseHeredodegenerative Disorders, Nervous SystemPolymorphism, GeneticGenetic MarkersPolymerase Chain ReactionDNANerve Tissue ProteinsGenomic InstabilityDinucleotide RepeatsMutation, MissenseGenetic VariationMinisatellite RepeatsGenotypeFrontotemporal DementiaFlap EndonucleasesSequence Analysis, DNATandem Repeat SequencesAnticipation, GeneticNucleic Acid ConformationModels, GeneticPhenotypeChromosome MappingAge of OnsetInverted Repeat SequencesHeterozygoteDNA, SatelliteCerebellar AtaxiaGenetic Diseases, InbornDNA PrimersIntranuclear Inclusion BodiesChromosome FragilityGenetic LinkageMuscular Dystrophy, OculopharyngealRNA-Binding ProteinsQuantitative Trait, HeritableGene FrequencyExonsNuclear ProteinsGenetics, PopulationAmyotrophic Lateral SclerosisFrameshift MutationDNA RepairHaplotypesGenes, DominantGenome, HumanNeurodegenerative DiseasesProteinsDNA Mutational AnalysisAmino Acid SequencePeptidesEvolution, MolecularMice, TransgenicDNA-Binding ProteinsSaccharomyces cerevisiaeTranscription, GeneticReceptors, AndrogenMutS Homolog 2 ProteinGenetic TestingRecombination, GeneticDNA ReplicationDNA, PlantSequence DeletionRNA, MessengerPhylogenyGerm-Line MutationCell LineChromosomes, Human, XGenetic LociExpressed Sequence TagsDisease Models, AnimalMyoclonic Epilepsies, ProgressiveFounder EffectSpecies SpecificitySaccharomyces cerevisiae ProteinsNucleic Acid HeteroduplexesX ChromosomeRepetitive Sequences, Amino AcidPolymorphism, Single NucleotideMutation RateTranscription FactorsGenetic Predisposition to Disease