Immunogen sequence: GLDVKHLILV VNYSCPNHYE DYVHRAGRTG RAGNKGYAYT FITEDQARYA GDIIKALELS GTAVPPDLEK LWSDFKDQQK AEGKIIKKSS GFSGKGFKFD ETEQALANER KKLQKAALGL QDSDDEDAAV DIDEQIESMF NSKKRVKDMA APGTSSVPAP TAGNAEKLEI AKRLALRINA QKNLGIESQD VMQQATNAIL RGGTILAPTV SAK