Immunogen sequence: MAALTTLFKY IDENQDRYIK KLAKWVAIQS VSAWPEKRGE IRRMMEVAAA DVKQLGGSVE LVDIGKQKLP DGSEIPLPPI LLGRLGSDPQ KKTVCIYGHL DVQPAALEDG WDSEPFTLVE RDGKLYGRGS TDDKGPVAGW INALEAYQKT GQEIPVNVRF CLEGMEESGS EGLDELIFAR KDTFFKDVDY VCISDNYWLG KKKPCITYGL; Po