3043816 mHTT mutant huntingtin 401 3043818 mHTT mutant huntingtin protein 119 3043841 mhtt mutant htt 11 3043833 mhtt mutation of the huntingtin 3 3043842 mhtt mice expressing poly(Q)-expanded full-length huntingtin 1 3043843 mhtt Mutated htt 1 3043844 mhtt mutated protein huntingtin 1