Immunogen sequence: QNQKEEKLCT ENFTRILDSL LDGYDNRLRP GFGGPVTEVK TDIYVTSFGP VSDVEMEYTM DVFFRQTWID KRLKYDGPIE ILRLNNMMVT KVWTPDTFFR NGKKSVSHNM TAPNKLFRIM RNGTILYTMR LTISAECPMR LVDFPMDGHA CPLKFGSYAY PKSEMIYTWT KGPEKSVEVP KESSSLVQYD LIGQTVSSET IKSITGEYIV MTV