Immunogen sequence: WQGLFQLYLD EAGRGHSFSF HGAALTAPKQ GQELMAKALE SLSCPKDMAP SHCAEHKDQF LQLSQYRQLK TAEDYQALNK DIEAQLQHAG LREAGRIFYF SVPPFAYEDI AR Highest antigen sequence identity to the following orthologs: Mouse - 83%, Rat - 83%. The cystatin superfamily