Immunogen sequence: YDKPASFFKE TPLDLQHRLF MKLGSMHSPF RARSEPEDPV TERSAFTERD AGSGLVTRLR ERPALLVSST SWTEDEDFSI LLAALEKFEQ LTLDGHNLPS LVCVITGKGP LREYYSRLIH QKHFQHIQVC TPWLEAEDYP LLLGSADLGV CLHTSSSGLD LPMKVVDMFG CCLPVCAVNF KCLHELVKHE ENGLVFEDSE ELAAQLQMLF SNF