Anti-outer dynein arm docking complex subunit 4 antibodies are used for the immunodetection of the protein encoded by the ODAD4 gene. In humans, the canonical protein has a reported length of 672 amino acid residues and a mass of 76.7 kDa. Its subcellular localization is in the cytoplasm. Alternative splicing is reported to yield 2 different isoforms for this protein. It is reported to be expressed in the nasal mucosa. It is a known component of the outer dynein arm-docking complex (ODA-DC) that mediates outer dynein arms (ODA) binding onto the doublet microtubule. The gene encoding this protein is implicated in Ciliary dyskinesia. Other names for this target antigen include tetratricopeptide repeat domain 25, tetratricopeptide repeat protein 25, and TPR repeat protein 25. Gene orthologs have been identified in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species.