Immunogen sequence: MAIPGRQYGL ILPKKTQQLH PVLQKPSVFG NDSDDDDETS VSESLQREAA KKQAMKQTKL EIQKALAEDA TVYEYDSIYD EMQKKKEENN PKLLLGKDRK PKYIHNLLKA VEIRKKEQEK RMEKKIQRER EMEKGEFDDK EAFVTSAYKK KLQERAEEEE REKRAAALEA CLDVTKQKDL SGFYRHLLNQ AVGEEEVPKC SFREARSGIK EEK