As for Arl13b-EGFPtg:cPkd1 mice, we observed an ~2.4 fold increase in cilia length with the progression of ADPKD (4.1 ± 0.1 μm for control littermates and 9.9 ± 0.5 μm for 2 months post-treatment)(Figure 1—figure supplement 2D). The gene discussed is ARL13B; the disease is autosomal dominant polycystic kidney disease.