Trinucleotide Repeat ExpansionTrinucleotide RepeatsMicrosatellite RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinDNA, SatelliteAllelesPolymorphism, GeneticIron-Binding ProteinsGenetic MarkersBase SequenceMolecular Sequence DataGenetic VariationDNA PrimersPolymerase Chain ReactionRepetitive Sequences, Nucleic AcidMutationSpinocerebellar AtaxiasMachado-Joseph DiseaseHeredodegenerative Disorders, Nervous SystemGenomic InstabilityNerve Tissue ProteinsDinucleotide RepeatsDNAMinisatellite RepeatsFrontotemporal DementiaFlap EndonucleasesPedigreeAnticipation, GeneticTandem Repeat SequencesNucleic Acid ConformationInverted Repeat SequencesCerebellar AtaxiaAge of OnsetIntranuclear Inclusion BodiesChromosome FragilitySequence Analysis, DNAGenetic Diseases, InbornMuscular Dystrophy, OculopharyngealRNA-Binding ProteinsGenotypeModels, GeneticAmyotrophic Lateral SclerosisPhenotypeChromosome MappingGene FrequencyNeurodegenerative DiseasesHaplotypesHeterozygoteGenetics, PopulationNuclear ProteinsDNA RepairGenome, HumanPeptidesGenetic LinkageProteinsReceptors, AndrogenMice, TransgenicMutS Homolog 2 ProteinGenes, DominantEvolution, MolecularDNA, PlantDNA ReplicationExonsTranscription, GeneticMyoclonic Epilepsies, ProgressiveExpressed Sequence TagsSaccharomyces cerevisiaeDNA-Binding ProteinsRecombination, GeneticChromosomes, Human, XRepetitive Sequences, Amino AcidNucleic Acid HeteroduplexesGenetic LociAmino Acid SequenceDNA Mutational AnalysisRNA, MessengerDisease Models, Animal