Component of the intraflagellar transport (IFT) complex B required for transport of proteins in the motile cilium (PubMed:28479320). May be required for ciliary entrance and transport of specific ciliary cargo proteins such as che-3 which are related to motility (PubMed:28479320). Required for normal morphology and function of ciliated amphid sensory neurons (PubMed:16648645, PubMed:7705621). Component of the IFT complex B composed of at least che-2, che-13, dyf-1, dyf-3, dyf-6, dyf-11, dyf-13, ift-20, ift-74, ift-81, ifta-2, osm-1, osm-5 and osm-6. Highly expressed in the transition zones between the cilium basal body and the dendrites. Expressed in the hypodermis and sensory neurons including inner labial, PDE, amphid and phasmid neurons. Expressed from hatching to adulthood. Expressed in dauer larvae. Shorter and compacted dendritic endings of the amphid and phasmid neurons with an abnormal distribution of the intraflagellar transport protein osm-6 along these ciliated endings (PubMed:16648645). Defective chemotaxis with 78% of mutants exhibiting reduced tracking to the chemoattractant ammonium chloride (PubMed:7705621). Belongs to the IFT46 family. Extended N-terminus. Extended N-terminus.