Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidSpinocerebellar AtaxiasMachado-Joseph DiseaseBase SequenceHeredodegenerative Disorders, Nervous SystemNerve Tissue ProteinsGenomic InstabilityFrontotemporal DementiaMolecular Sequence DataFlap EndonucleasesAnticipation, GeneticMicrosatellite RepeatsDNANucleic Acid ConformationInverted Repeat SequencesMinisatellite RepeatsPedigreeTandem Repeat SequencesCerebellar AtaxiaAge of OnsetIntranuclear Inclusion BodiesChromosome FragilityMuscular Dystrophy, OculopharyngealGenetic Diseases, InbornRNA-Binding ProteinsPolymerase Chain ReactionAmyotrophic Lateral SclerosisPolymorphism, GeneticNeurodegenerative DiseasesNuclear ProteinsPhenotypePeptidesProteinsDNA RepairSequence Analysis, DNAReceptors, AndrogenModels, GeneticMice, TransgenicGenotypeDNA PrimersGenes, DominantDNA ReplicationMyoclonic Epilepsies, ProgressiveGenome, HumanTranscription, GeneticMutS Homolog 2 ProteinHeterozygoteGenetic MarkersRepetitive Sequences, Amino AcidExonsDisease Models, AnimalSaccharomyces cerevisiaeNucleic Acid HeteroduplexesDNA-Binding ProteinsRNA, MessengerAmino Acid SequenceGene Frequency