Outer dense fibers are filamentous structures located on the outside of the axoneme in the midpiece and principal piece of the mammalian sperm tail. May help to maintain the passive elastic structures and elastic recoil of the sperm tail.
Belongs to the ODF3 family. Contains 2 DUF1309 repeats.
Cytoplasm. Expressed in the cytoplasmic lobe of spermatids.