Immunogen sequence: LYPHQVPLVL QVLKQTARSS SWHARYTVLT YLQTMVFYNL FIFLNNEDAV KDIRWLVISL LEDEQLEVRE MAATTLSGLL QCNFLTMDSP MQIHFEQLCK TKLPKKRKRD PGSVGDTIPS AELVKRHAGV LGLGACVLSS PYDVPTWMPQ LLMNLSAHLN DPQPIEMTVK KTLSNFRRTH HDNWQEHKQQ FTDDQLLVLT DLLVSPCYYA; Po