Immunogen sequence: SNSIYYFRDT HIIKAQSQLV AGIKYFLTME MGSTDCRKTR VTGDHVDLTT CPLAAGAQQE KLRCDFEVLV VPWQNSSQLL KH Highest antigen sequence identity to the following orthologs: Mouse - 72%, Rat - 74%. The cystatin superfamily is a well-established family of