Trinucleotide Repeat ExpansionTrinucleotide RepeatsFriedreich AtaxiaDNA Repeat ExpansionSpinocerebellar DegenerationsMyotonic DystrophyFragile X SyndromeHuntington DiseaseFragile X Mental Retardation ProteinMicrosatellite RepeatsIron-Binding ProteinsAllelesMutationRepetitive Sequences, Nucleic AcidBase SequenceSpinocerebellar AtaxiasMachado-Joseph DiseaseMusclesMolecular Sequence DataHeredodegenerative Disorders, Nervous SystemNerve Tissue ProteinsGenomic InstabilityDNADinucleotide RepeatsPolymorphism, GeneticGenetic MarkersMinisatellite RepeatsFrontotemporal DementiaFlap EndonucleasesPedigreeAnticipation, GeneticPolymerase Chain ReactionTandem Repeat SequencesNucleic Acid ConformationInverted Repeat SequencesGenetic VariationDNA, SatelliteCerebellar AtaxiaAge of OnsetMuscle ProteinsMuscle, SkeletalIntranuclear Inclusion BodiesSequence Analysis, DNAChromosome FragilityGenetic Diseases, InbornMuscle, SmoothMuscular Dystrophy, OculopharyngealRNA-Binding ProteinsGenotypeModels, GeneticPhenotypeDNA PrimersMuscle Fibers, SkeletalAmyotrophic Lateral SclerosisMuscle, Smooth, VascularChromosome MappingNuclear ProteinsGene FrequencyHeterozygoteNeurodegenerative DiseasesHaplotypesGenetics, PopulationDNA RepairGenome, HumanPeptidesProteinsMuscle DevelopmentGenetic LinkageMuscle ContractionMice, TransgenicReceptors, AndrogenRNA, MessengerGenes, DominantTranscription, GeneticMutS Homolog 2 ProteinEvolution, MolecularDNA ReplicationExonsDNA, PlantAmino Acid SequenceDNA-Binding ProteinsDisease Models, AnimalExpressed Sequence TagsMyoclonic Epilepsies, ProgressiveSaccharomyces cerevisiaeRecombination, GeneticRepetitive Sequences, Amino AcidChromosomes, Human, XNucleic Acid HeteroduplexesGenetic LociDNA Mutational AnalysisMuscle FatigueMuscle Fibers, Fast-TwitchMuscle DenervationPhylogeny