Immunogen sequence: PLENEPKEML TLSEYHERVR SQGQQLQQLQ AELDKLHKEV STVRAANSER VAKLVFQRLN EDFVRKPDYA LSSVGASIDL QKTSHDYAD Highest antigen sequence identity to the following orthologs: Mouse - 89%, Rat - 89%. The mammalian sperm flagellum contains two cytoske