Immunogen sequence: AQVLRNNPDA LSDVGEVPYW VLEPVLEGWR PDQLYRRKKD NHALVRETDE LRRNHCFQDF KEEKPQENKT WREQYLRLPD APEQRLRVMT TNIRSARGNN PNGREAKMIC FKSVAKTPYD TSRRQEKSAG DADPENGEIK PASKPAGSSH TPSSQSSSGG GRDSSSSILR WLPEKRANPC LSSSNEHAAP AAKTRKQAAK KVAPLMAKAI RDY