Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionFragile X SyndromeSpinocerebellar DegenerationsMyotonic DystrophyFragile X Mental Retardation ProteinHuntington DiseaseIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidDried Blood Spot TestingMachado-Joseph DiseaseBase SequenceHeredodegenerative Disorders, Nervous SystemNerve Tissue ProteinsGenomic InstabilityMolecular Sequence DataFrontotemporal DementiaFlap EndonucleasesAnticipation, GeneticMicrosatellite RepeatsDNANucleic Acid ConformationInverted Repeat SequencesMinisatellite RepeatsPedigreeEthical ReviewRNA-Binding ProteinsCerebellar AtaxiaIntranuclear Inclusion BodiesAge of OnsetChromosome FragilityMuscular Dystrophy, OculopharyngealGenetic Diseases, InbornPolymerase Chain ReactionAmyotrophic Lateral SclerosisPolymorphism, GeneticNeurodegenerative DiseasesNuclear ProteinsPhenotypeProteinsPeptidesDNA RepairSequence Analysis, DNAReceptors, AndrogenModels, GeneticMice, TransgenicAtaxiaGenotypeDNA PrimersHeterozygoteDNA ReplicationGenes, DominantTranscription, GeneticMyoclonic Epilepsies, ProgressiveGenome, HumanExonsGenetic MarkersDisease Models, AnimalMutS Homolog 2 ProteinRNA, MessengerRepetitive Sequences, Amino AcidNucleic Acid HeteroduplexesSaccharomyces cerevisiaeDNA-Binding ProteinsChromosomes, Human, XAmino Acid SequenceGene Frequency