Immunogen sequence: MSGPGNKRAA GDGGSGPPEK KLSREEKTTT TLIEPIRLGG ISSTEEMDLK VLQFKNKKLA ERLEQRQACE DELRERIEKL EKRQATDDAT LLIVNRYWAQ LDETVEALLR CHESQGELSS APEAPGTQEG PTCDGTPLPE PGTSELRDPL LMQLRPPLSE PALAFVVALG ASSSEEVELE LQGRMEFSKA AVSRVVEASD RLQRRVEELC QRV