Immunogen sequence: ANSSGKGALA LEEKRRLEAR IAQLEEELEE EQGNTELIND RLKKANLQID QINTDLNLER SHAQKNENAR QQLERQNKEL KVKLQEMEGT VKSKYKASIT ALEAKIAQLE EQLDNETKER QAACKQVRRT EKKLKDVLLQ VDDERRNAEQ YKDQADKAST RLKQLKRQLE EAEEEAQRAN ASRRKLQREL EDATETADAM NREVSSLKNK LRR