Immunogen sequence: MSNVSEERRK RQQNIKEGLQ FIQSPLSYPG TQEQYAVYLR ALVRNLFNEG NDVYREHDWN NSISQYTEAL NIADYAKSEE ILIPKEIIEK LYINRIACYS NMGFHDKVLE DCNIVLSLNA SNCKALYRKS KALSDLGRYK KAYDAVAKCS LAVPQDEHVI KLTQELAQKL GFKIRKAYVR AELSLKSVPG DGATKALNHS VEDIEPDLLT PRQ