Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidSpinocerebellar AtaxiasMachado-Joseph DiseaseHeredodegenerative Disorders, Nervous SystemBase SequenceNerve Tissue ProteinsGenomic InstabilityMolecular Sequence DataFrontotemporal DementiaFlap EndonucleasesMicrosatellite RepeatsAnticipation, GeneticDNAPedigreeNucleic Acid ConformationInverted Repeat SequencesMinisatellite RepeatsTandem Repeat SequencesAge of OnsetCerebellar AtaxiaIntranuclear Inclusion BodiesChromosome FragilityMuscular Dystrophy, OculopharyngealGenetic Diseases, InbornPolymerase Chain ReactionRNA-Binding ProteinsAmyotrophic Lateral SclerosisNeurodegenerative DiseasesPolymorphism, GeneticPhenotypeNuclear ProteinsProteinsPeptidesDNA RepairSequence Analysis, DNAModels, GeneticReceptors, AndrogenMice, TransgenicBipolar DisorderGenotypeGenes, DominantDNA PrimersGenome, HumanMyoclonic Epilepsies, ProgressiveDNA ReplicationDisease Models, AnimalHeterozygoteGenetic MarkersTranscription, GeneticExonsMutS Homolog 2 ProteinRepetitive Sequences, Amino AcidSaccharomyces cerevisiaeRNA, MessengerMental DisordersNucleic Acid HeteroduplexesDNA-Binding ProteinsAmino Acid SequenceGene FrequencyBrain