Immunogen sequence: SALEYQLSEI QKSNMQIKSN IGTLKDAHEF KEDRSPYPQD FHNVMQLLDS QESKWTARVQ AIHQEHKKEK GRLLSHIEKL RTSMI Highest antigen sequence identity to the following orthologs: Mouse - 72%, Rat - 73%. May participate in spermatogenesis via its interaction