Immunogen sequence: LEFILVQADT PSSPSIDQVE PYSSTAQVQF DEPEATGGVP ILKYKAEWRA VGEEVWHSKW YDAKEASMEG IVTIVGLKPE TTYAVRLAAL NGKGLGEISA ASEFKTQPVQ GEPSAPKLEG QMGEDGNSIK VNLIKQDDGG SPIRHYLVRY RALSSEWKPE IRLPSGSDHV MLKSLDWNAE YEVYVVAENQ QGKSKAAHFV FRTSAQPTAI PAN