Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinPolymorphism, GeneticAllelesMicrosatellite RepeatsIron-Binding ProteinsPolymorphism, Single NucleotideGenotypeGene FrequencyMutationGenetic Predisposition to DiseaseRepetitive Sequences, Nucleic AcidBase SequenceHaplotypesMolecular Sequence DataPolymerase Chain ReactionSpinocerebellar AtaxiasGenetic VariationMachado-Joseph DiseaseMinisatellite RepeatsGenetic MarkersCase-Control StudiesDNACatechol O-MethyltransferaseHeredodegenerative Disorders, Nervous SystemNerve Tissue ProteinsDinucleotide RepeatsSequence Analysis, DNAGenomic InstabilityPedigreeTandem Repeat SequencesPhenotypeFrontotemporal DementiaAge of OnsetFlap EndonucleasesAnticipation, GeneticLinkage DisequilibriumHeterozygoteNucleic Acid ConformationDNA PrimersModels, GeneticInverted Repeat SequencesDNA, SatellitePromoter Regions, GeneticSerotonin Plasma Membrane Transport ProteinsGenetics, PopulationCerebellar AtaxiaChromosome MappingGenetic Diseases, InbornIntranuclear Inclusion BodiesGenetic Association StudiesChromosome FragilityGenetic LinkageMuscular Dystrophy, OculopharyngealRNA-Binding ProteinsNuclear ProteinsAsian Continental Ancestry GroupExonsDNA Mutational AnalysisAmyotrophic Lateral SclerosisGenome, HumanDNA RepairNeurodegenerative DiseasesProteinsGenetic TestingTranscription, GeneticPeptidesMonoamine OxidaseHomozygoteEvolution, MolecularRNA, MessengerReceptors, AndrogenChinaDNA-Binding ProteinsDNA, PlantEuropean Continental Ancestry GroupAmino Acid SequenceGenes, DominantMice, TransgenicRisk FactorsMutS Homolog 2 ProteinPhylogenyGenetic LociMethylenetetrahydrofolate Reductase (NADPH2)Expressed Sequence TagsDNA ReplicationRecombination, GeneticGlutathione S-Transferase piSaccharomyces cerevisiaeMyoclonic Epilepsies, ProgressiveChromosomes, Human, XPoint MutationRepetitive Sequences, Amino Acid