Immunogen sequence: SIPHLILELL KCEPDEPQVQ AKIMAYLQQE QANRSKHEKL STFGLMCKMA DQTLFSIVEW ARSSIFFREL KVDDQMKLLQ NCWSELLILD HIYRQVVHGK EGSIFLVTGQ QVDYSIIASQ AGATLNNLMS HAQELVAKLR SLQFDQREFV CLKFLVLFSL DVKNLENFQL VEGVQEQVNA ALLDYTMCNY PQQTEKFGQL LLRLPEIRAI SMQ