Functions as part of axonemal radial spoke complexes that play an important part in the motility of sperm and cilia.
Subcellular locations: Cell projection, Cilium, Flagellum
Localizes both to epithelial motile cilium and the sperm flagellum . In spermatids, rapidly enriched in the coupling apparatus with the elongation of the spermatid. Tightly attached to the implantation fossa during the maturation of the spermatid. In mature spermatzoa evenly distributed along the flagellum (By similarity).
Specifically expressed in testis and trachea.