Component of the outer dynein arm-docking complex (ODA-DC) that mediates outer dynein arms (ODA) binding onto the doublet microtubule (By similarity). Involved in mediating assembly of both ODAs and their axonemal docking complex onto ciliary microtubules (PubMed:23849778). Component of the outer dynein arm-docking complex along with ODAD1, ODAD3, and ODAD4. Highly expressed in testis. In males, also detected at lower levels in lung, brain, liver and muscle. In females, detected in ovary. At 7.5 dpc, expressed in the ventral node.