Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsAllelesMyotonic DystrophyFragile X SyndromePolymorphism, GeneticHuntington DiseaseFragile X Mental Retardation ProteinIron-Binding ProteinsReceptors, KIR3DL2Base SequenceMolecular Sequence DataMutationGene FrequencyRepetitive Sequences, Nucleic AcidPolymerase Chain ReactionPolymorphism, Single NucleotideSpinocerebellar AtaxiasGenotypeHaplotypesMachado-Joseph DiseaseHLA-DQ AntigensGenetic VariationHeredodegenerative Disorders, Nervous SystemSequence Analysis, DNAAmino Acid SequenceNerve Tissue ProteinsMicrosatellite RepeatsDNAGenomic InstabilityFrontotemporal DementiaFlap EndonucleasesMinisatellite RepeatsAnticipation, GeneticPedigreeTandem Repeat SequencesNucleic Acid ConformationInverted Repeat SequencesAge of OnsetReceptors, IgGCerebellar AtaxiaIntranuclear Inclusion BodiesChromosome FragilityMajor Histocompatibility ComplexMuscular Dystrophy, OculopharyngealGenetic Diseases, InbornGenetic Predisposition to DiseaseRNA-Binding ProteinsPhenotypeAmyotrophic Lateral SclerosisNuclear ProteinsNeurodegenerative DiseasesModels, GeneticGenetic MarkersDNA RepairProteinsCase-Control StudiesDNA PrimersPeptidesHeterozygoteExonsReceptors, AndrogenGenome, HumanMice, TransgenicGenes, DominantDNA Mutational AnalysisTranscription, GeneticDNA-Binding ProteinsChromosome MappingDNA ReplicationMyoclonic Epilepsies, ProgressiveRNA, MessengerMutS Homolog 2 ProteinRepetitive Sequences, Amino AcidNucleic Acid HeteroduplexesSaccharomyces cerevisiaePromoter Regions, GeneticDinucleotide RepeatsGenetic LinkageDisease Models, AnimalGenetic TestingChromosomes, Human, X