Trinucleotide Repeat ExpansionTrinucleotide RepeatsHuntington DiseaseFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeFragile X Mental Retardation ProteinMicrosatellite RepeatsIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidNerve Tissue ProteinsBase SequenceSpinocerebellar AtaxiasMachado-Joseph DiseaseMolecular Sequence DataHeredodegenerative Disorders, Nervous SystemGenetic MarkersPedigreeDNAGenomic InstabilityDinucleotide RepeatsAge of OnsetPolymorphism, GeneticMinisatellite RepeatsFrontotemporal DementiaFlap EndonucleasesAnticipation, GeneticPolymerase Chain ReactionTandem Repeat SequencesNucleic Acid ConformationInverted Repeat SequencesNuclear ProteinsGenetic VariationDNA, SatelliteGenetic Diseases, InbornCerebellar AtaxiaNeurodegenerative DiseasesGenotypeIntranuclear Inclusion BodiesChromosome FragilitySequence Analysis, DNAMuscular Dystrophy, OculopharyngealModels, GeneticPhenotypeRNA-Binding ProteinsChromosome MappingPeptidesHeterozygoteGene FrequencyMice, TransgenicHaplotypesDNA PrimersGenetic LinkageAmyotrophic Lateral SclerosisGenetics, PopulationDisease Models, AnimalDNA RepairProteinsGenome, HumanGenetic TestingChromosomes, Human, Pair 4Receptors, AndrogenBrainExonsMutS Homolog 2 ProteinGenes, DominantEvolution, MolecularDNA, PlantDNA ReplicationTranscription, GeneticMyoclonic Epilepsies, ProgressiveExpressed Sequence TagsSaccharomyces cerevisiaeAmino Acid SequenceDNA-Binding ProteinsRecombination, GeneticChromosomes, Human, XRepetitive Sequences, Amino AcidGene Knock-In TechniquesNucleic Acid HeteroduplexesGenetic LociDNA Mutational AnalysisRNA, Messenger