Immunogen sequence: AQDIQDKFSS ILSRGQEAYE RLLWNGRYYN YDSSSRPQSR SVMSDQCAGQ WFLKACGLGE GDTEVFPTQH VVRALQTIFE LNVQAFAGGA MGAVNGMQPH GVPDKSSVQS DEVWVGVVYG LAATMIQEGL TWEGFQTAEG CYRTVWERLG LAFQTPEAYC QQRVFRSLAY MRPLSIWAMQ LALQQQQHKK ASWPKVKQGT GLRTGPMFGP KEA