Trinucleotide Repeat ExpansionTrinucleotide RepeatsHuntington DiseaseFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeFragile X Mental Retardation ProteinMicrosatellite RepeatsIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidTandem Repeat SequencesBase SequenceNerve Tissue ProteinsSpinocerebellar AtaxiasMolecular Sequence DataMachado-Joseph DiseaseHeredodegenerative Disorders, Nervous SystemGenetic MarkersDNAMinisatellite RepeatsPedigreeGenomic InstabilityPolymorphism, GeneticDinucleotide RepeatsAge of OnsetPolymerase Chain ReactionFrontotemporal DementiaFlap EndonucleasesAnticipation, GeneticGenetic VariationNucleic Acid ConformationNuclear ProteinsInverted Repeat SequencesDNA, SatelliteGenetic Diseases, InbornGenotypeSequence Analysis, DNACerebellar AtaxiaNeurodegenerative DiseasesIntranuclear Inclusion BodiesPhenotypeChromosome FragilityModels, GeneticMuscular Dystrophy, OculopharyngealPeptidesRNA-Binding ProteinsChromosome MappingMice, TransgenicHeterozygoteDNA PrimersHaplotypesGene FrequencyGenetic LinkageAmyotrophic Lateral SclerosisGenetics, PopulationDisease Models, AnimalProteinsDNA RepairGenome, HumanEvolution, MolecularGenetic TestingChromosomes, Human, Pair 4Amino Acid SequenceReceptors, AndrogenExonsBrainDNA, PlantMutS Homolog 2 ProteinDNA ReplicationGenes, DominantTranscription, GeneticPhylogenyRepetitive Sequences, Amino AcidSaccharomyces cerevisiaeDNA-Binding ProteinsMyoclonic Epilepsies, ProgressiveExpressed Sequence TagsRecombination, GeneticTandem Mass SpectrometryRNA, MessengerGene Knock-In TechniquesChromosomes, Human, XNucleic Acid HeteroduplexesGenetic LociCell LineDNA Mutational Analysis