molecule of the mutant huntingtin protein, mhtt, the cause of huntington's disease, 3d

mutant mhtt huntingtin protein disorder medicine 3d genetic damage biotechnology medical research dna molecular gene structure mutation illustration molecule disease regulation regeneration cellular biochemical neuronal huntington chorea code genome hereditary syndrome htt neurodegenerative brain inherited juvenile hyperkinetic movement mutated autosomal dominant polyq polyglutamine glutamine expansion neurodegeneration neurotrophic factors neuroprotection