Huntington DiseaseNerve Tissue ProteinsTrinucleotide Repeat ExpansionNuclear ProteinsInclusion BodiesPeptidesCorpus StriatumMutationNeuronsIntranuclear Inclusion BodiesDopamine and cAMP-Regulated Phosphoprotein 32Gene Knock-In TechniquesNeostriatumMice, TransgenicDisease Models, AnimalRotarod Performance TestMutant ProteinsBrain