Immunogen sequence: MENFILYEEI GRGSKTVVYK GRRKGTINFV AILCTDKCKR PEITNWVRLT REIKHKNIVT FHEWYETSNH LWLVVELCTG GSLKTVIAQD ENLPEDVVRE FGIDLISGLH HLHKLGILFC DISPRKILLE GPGTLKFSNF CLAKVEGENL EEFFALVAAE EGGGDNGENV LKKSMKSRVK GSPVYTAPEV VRGADFSISS DLWSLGCLLY EMF