Immunogen sequence: SVDEEELRKQ REEITAIVKM RVAGTASGTQ HAGDFICTVY LEEKKAETEQ HIKVPASMTA EELTLEILDR RNVGIREKDY WTCFEVNERE EAERPLHFAE KVLPILHGLG TDSHLVVKKH QAMEAMLLYL ASRVGDTKHG MMKFREDRSL LGLGLPSGGF HDRYFILNSS CLRLYKEVRS HRPEKEWPIK SLKVYLGVKK KLRPPTCWGF TVV