Interestingly, in 3 week old 30Q (D776) mice (where fewer CAG repeats are overexpressed but a point mutation enhances nuclear translocation of ATXN1) CFs are also retracted (Ebner et al., 2013) and these mice exhibit ataxia 3 weeks later (Duvick et al., 2010). The gene discussed is ATXN1; the disease is cerebellar ataxia.