Immunogen sequence: RTVAVKQLGV NPSTTGTQEL KPGLEGSLGV GDTLYLVNGL HPLTLRWEET RTPESQPDTP PGTPLVSQDE KRDAELPKKR MRKSNPGWEN LEKLLVFTAA GVKPQGKVAG FDLDGTLITT RSGKVFPTGP SDWRILYPEI PRKLRELEAE GYKLVIFTNQ MSIGRGKLPA EEFKAKVEAV VEKLGVPFQV LVATHAGLYR KPVTGMWDHL QEQ