Immunogen sequence: TSAQNIEFLQV IAKREEAIHQ SQLRLEEKTR ECGTLARQLE SAIEDARRQV EQTKEHALSK ERAAQNKILD LETQLSRTKT ELSQLRRSRD DADRRYQSRL QDLKDRLEQS ESTNRSMQNY VQFLKSSYAN VFGDG Highest antigen sequence identity to the following orthologs - mouse 93%, rat 93%. S