BBS5 and ciliopathy: We picked the mutants bbs-5(gk537) (a component of BBSome), mks-5(tm3100) (a component of MKS module), and nphp-4(tm925) (a component of NPHP module) because they are all ciliopathy disease genes, they do not have severe defects in cilia structure, and structural enhancement in cilia would be visible if they do.