Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinMicrosatellite RepeatsIron-Binding ProteinsAllelesGenomic InstabilityMutationRepetitive Sequences, Nucleic AcidBase SequenceTandem Repeat SequencesMolecular Sequence DataSpinocerebellar AtaxiasMachado-Joseph DiseaseHeredodegenerative Disorders, Nervous SystemGenetic MarkersPolymorphism, GeneticMinisatellite RepeatsDNADinucleotide RepeatsNerve Tissue ProteinsPedigreePolymerase Chain ReactionGenetic VariationGenetic LociFlap EndonucleasesAnticipation, GeneticDNA, SatelliteFrontotemporal DementiaNucleic Acid ConformationChromosome MappingChromosomal InstabilityInverted Repeat SequencesSequence Analysis, DNAGenotypeChromosome FragilityModels, GeneticAge of OnsetCerebellar AtaxiaPhenotypeJoint InstabilityGenetic Diseases, InbornIntranuclear Inclusion BodiesMuscular Dystrophy, OculopharyngealRNA-Binding ProteinsDNA PrimersGenetic LinkageDNA RepairNuclear ProteinsGene FrequencyHeterozygoteGenetics, PopulationGenome, HumanAmyotrophic Lateral SclerosisHaplotypesNeurodegenerative DiseasesProteinsPeptidesMutS Homolog 2 ProteinMicrosatellite InstabilityRecombination, GeneticEvolution, MolecularDNA ReplicationAmino Acid SequenceMice, TransgenicDNA-Binding ProteinsTranscription, GeneticGenes, DominantDNA, PlantExonsReceptors, AndrogenSaccharomyces cerevisiaeQuantitative Trait LociDNA Mutational AnalysisPhylogenyRNA, MessengerRepetitive Sequences, Amino AcidExpressed Sequence TagsChromosomes, Human, XMyoclonic Epilepsies, ProgressiveTandem Mass SpectrometryX ChromosomeDisease Models, AnimalSpecies SpecificityNucleic Acid HeteroduplexesSequence DeletionSaccharomyces cerevisiae ProteinsCell LineGenetic Testing