Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinMicrosatellite RepeatsIron-Binding ProteinsAllelesRepetitive Sequences, Nucleic AcidMutationBase SequenceSpinocerebellar AtaxiasMolecular Sequence DataMachado-Joseph DiseaseTandem Repeat SequencesMinisatellite RepeatsDinucleotide RepeatsHeredodegenerative Disorders, Nervous SystemNerve Tissue ProteinsGenomic InstabilityPolymorphism, GeneticDNAInverted Repeat SequencesGenetic MarkersFrontotemporal DementiaPedigreeFlap EndonucleasesPolymerase Chain ReactionAnticipation, GeneticNucleic Acid ConformationGenetic VariationDNA, SatelliteSequence Analysis, DNACerebellar AtaxiaAge of OnsetIntranuclear Inclusion BodiesChromosome FragilityGenetic Diseases, InbornMuscular Dystrophy, OculopharyngealGenotypeRNA-Binding ProteinsModels, GeneticDNA PrimersChromosome MappingPhenotypeAmyotrophic Lateral SclerosisNuclear ProteinsGene FrequencyHaplotypesNeurodegenerative DiseasesHeterozygoteRepetitive Sequences, Amino AcidGenetics, PopulationDNA RepairGenome, HumanPeptidesProteinsGenetic LinkageReceptors, AndrogenEvolution, MolecularAmino Acid SequenceMice, TransgenicDNA, PlantTranscription, GeneticDNA ReplicationMutS Homolog 2 ProteinGenes, DominantAnkyrin RepeatExonsDNA-Binding ProteinsSaccharomyces cerevisiaeRecombination, GeneticExpressed Sequence TagsMyoclonic Epilepsies, ProgressiveRNA, MessengerChromosomes, Human, XPhylogenyNucleic Acid HeteroduplexesGenetic LociDNA Mutational AnalysisDisease Models, AnimalSequence Deletion