Immunogen sequence: MGTLRDLQYA LQEKIEELRQ RDALIDELEL ELDQKDELIQ KLQNELDKYR SVIRPATQQA QKQSASTLQG EPRTKRQAIS AEPTAFDIQD LSHVTLPFYP KSPQSKDLIK EAILDNDFMK NLELSQIQEI VDCMYPVEYG KDSCIIKEGD VGSLVYVMED GKVEVTKEGV KLCTMGPGKV FGELAILYNC TRTATVKTLV NVKLWAIDRQ CFQ