The reduced amphid cilia number in
arl-13 single mutants could be restored to nearly the wild-type level in
arl-3;
arl-13 double mutants. ARL-3 depletion significantly reduced the occurrence of the bulblike structures observed in
arl-13 mutants. The distal segments of
arl-3;
arl-13 mutants were restored to 9-10 cilia. Middle segment length of cilia was only partially restored in
arl-3;
arl-13 double mutants. Further IFT-A and IFT-B subcomplexes move together and OSM-3 tends to dissociate from the IFT complex and move alone in the middle segments.