Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinMicrosatellite RepeatsAllelesIron-Binding ProteinsTripletsPolymorphism, GeneticMutationRepetitive Sequences, Nucleic AcidBase SequencePolymorphism, Single NucleotideSpinocerebellar AtaxiasMolecular Sequence DataMachado-Joseph DiseaseHeredodegenerative Disorders, Nervous SystemPolymerase Chain ReactionDNAGenetic MarkersGene FrequencyGenetic VariationNerve Tissue ProteinsMinisatellite RepeatsDinucleotide RepeatsGenomic InstabilityPedigreeGenotypeTandem Repeat SequencesNucleic Acid ConformationAnticipation, GeneticHaplotypesFlap EndonucleasesFrontotemporal DementiaSequence Analysis, DNAInverted Repeat SequencesAge of OnsetDNA, SatelliteModels, GeneticGenetic Diseases, InbornCerebellar AtaxiaGenetic Predisposition to DiseasePhenotypeDNA PrimersIntranuclear Inclusion BodiesMuscular Dystrophy, OculopharyngealChromosome FragilityHeterozygoteRNA-Binding ProteinsChromosome MappingGenetics, PopulationGenetic LinkageGenome, HumanPregnancy, TripletAmyotrophic Lateral SclerosisDNA RepairNuclear ProteinsNeurodegenerative DiseasesCase-Control StudiesProteinsExonsPeptidesEvolution, MolecularReceptors, AndrogenDNA Mutational AnalysisDNA, PlantAmino Acid SequencePhylogenyMice, TransgenicGenes, DominantTranscription, GeneticMutS Homolog 2 ProteinDNA-Binding ProteinsLinkage DisequilibriumDNA ReplicationGenetic LociExpressed Sequence TagsRecombination, GeneticRNA, MessengerSaccharomyces cerevisiaePromoter Regions, GeneticRepetitive Sequences, Amino AcidNucleic Acid HeteroduplexesMyoclonic Epilepsies, ProgressiveChromosomes, Human, XGenetic TestingSpecies SpecificitySequence DeletionX ChromosomeDisease Models, Animal