Immunogen sequence: MAAARATTPA DGEEPAPEAE ALAAARERSS RFLSGLELVK QGAEARVFRG RFQGRAAVIK HRFPKGYRHP ALEARLGRRR TVQEARALLR CRRAGISAPV VFFVDYASNC LYMEEIEGSV TVRDYIQSTM ETEKTPQGLS NLAKTIGQVL ARMHDEDLIH GDLTTSNMLL KPPLEQLNIV LIDFGLSFIS ALPEDKGVDL YVLEKAFLST HPN