Immunogen sequence: VFVELLSPRR KRRGRKSANN TPENSPNFPN FRVIATKSSE QSRSVNIASK LSLQESESKR RCRKRQSPEP SPVTLGRRSS GRQGGVHELS AFEQLVVELV RHDDSWPFLK LVSKIQVPDY YDIIKKPIAL NIIREKVNKC EYKLASEFID DIELMFSNCF EYNPRNTSEA KAGTRLQAFF HIQAQKLGLH VTPSNVDQVS TPPAAKKSRI; Po