The function of Ensembl gene identifier ENSG00000155087 (ODF1, outer dense fiber of sperm tails 1) is as follows. Component of the outer dense fibers (ODF) of spermatozoa. ODF are filamentous structures located on the outside of the axoneme in the midpiece and principal piece of the mammalian sperm tail and may help to maintain the passive elastic structures and elastic recoil of the sperm tail.