Immunogen sequence: SWWYMRATGG SSRVMCDNVP GLVSSQRQLC HRHPDVMRAI SQGVAEWTAE CQHQFRQHRW NCNTLDRDHS LFGRVLLRSS RESAFVYAIS SAGVVFAITR ACSQGEVKSC SCDPKKMGSA KDSKGIFDWG GCSDNIDYGI KFARAFVDAK ERKGKDARAL MNLHNNRAGR KAVKRFLKQE CKCHGVSGSC TLRTCWLAMA DFRKTGDYLW RKY