Acts upstream of or within several processes, including epithelial cilium movement involved in extracellular fluid movement; flagellated sperm motility; and outer dynein arm assembly. Located in apical cytoplasm and cytosol. Used to study primary ciliary dyskinesia 19. Human ortholog(s) of this gene implicated in primary ciliary dyskinesia 19. Orthologous to human DNAAF11 (dynein axonemal assembly factor 11). [provided by Alliance of Genome Resources, Apr 2022]