To understand the putative ciliary ion channel function of polycystin-1 and/or polycystin-2, and to determine the effects of kidney cyst formation on cilia morphology, we crossed our Arl13b-EGFPtg strain (DeCaen et al., 2013) with cPkd1 or cPkd2 mice (provided by S. Somlo Yale Univ). The gene discussed is ARL13B; the disease is Kidney Cyst.