Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinGenetic Diseases, InbornIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidMachado-Joseph DiseaseSpinocerebellar AtaxiasBase SequencePedigreeHeredodegenerative Disorders, Nervous SystemMolecular Sequence DataNerve Tissue ProteinsDNAGenomic InstabilityMicrosatellite RepeatsFrontotemporal DementiaFlap EndonucleasesAnticipation, GeneticNucleic Acid ConformationAge of OnsetInverted Repeat SequencesMinisatellite RepeatsPhenotypeTandem Repeat SequencesPolymerase Chain ReactionCerebellar AtaxiaGenome, HumanIntranuclear Inclusion BodiesModels, GeneticChromosome FragilityRNA-Binding ProteinsMuscular Dystrophy, OculopharyngealDiseaseChromosome MappingPolymorphism, GeneticGenetic MarkersGenetic LinkageProteinsNuclear ProteinsGenes, DominantSequence Analysis, DNAGenotypeAmyotrophic Lateral SclerosisNeurodegenerative DiseasesDNA RepairExonsPeptidesGenetic TestingHeterozygoteHaplotypesDNA Mutational AnalysisMice, TransgenicDNA PrimersDisease Models, AnimalGene FrequencyReceptors, AndrogenGenetic Predisposition to DiseaseGenetic VariationAmino Acid SequenceTranscription, GeneticRepetitive Sequences, Amino AcidDNA ReplicationRNA, MessengerDNA-Binding ProteinsSaccharomyces cerevisiaeChromosomes, Human, XMyoclonic Epilepsies, ProgressiveMutS Homolog 2 ProteinRecombination, GeneticCell LineX ChromosomeNucleic Acid HeteroduplexesDNA, SatelliteGenetics, MedicalSequence Deletion