Immunogen sequence: VSSIHITKPV HILEERSLLV LTPAGLTQML NQTRFLMVLF HNPSSKQSRN LAEELGKAVE IMGKGKNGIG FGKVDITIEK ELQQEFGI Highest antigen sequence identity to the following orthologs: Mouse - 74%, Rat - 72%. Probable redox-inactive chaperone involved in sperm