Immunogen sequence: PLRALKSLWD YDFLIYDGVI DNTAPDFLAF KEHFSLAWGG IFSLLEHVEK FLRNYAIPEV KIKGNNLVAL LPEFELTNKL TRYDLLSVLE DPAHVQMLIN LPGQRYKGQD Highest antigen sequence identity to the following orthologs: Mouse - 68%, Rat - 60%. May play a regulatory role