NCIt definition : Human HTT wild-type allele is located in the vicinity of 4p16.3 and is approximately
199 kb in length. This allele, which encodes huntingtin protein, may play a role in
microtubule-mediated transport or vesicle function. Genetic polymorphism of this gene
is associated with Huntington disease.;
NCIt note : The HTT gene has a trinucleotide repeat sequence CAG, that encodes a glutamine rich
region and exhibits polymorphism in the human population. Individuals with more than
35 CAG repeats exhibit symptoms and an earlier age of onset for Huntington disease
that is dose dependent. Individuals with 10-35 CAG repeats are unaffected.;