Immunogen sequence: AAAAAEQQQF YLLLGNLLSP DNVVRKQAEE TYENIPGQSK ITFLLQAIRN TTAAEEARQM AAVLLRRLLS SAFDEVYPAL PSDVQTAIKS ELLMIIQMET QSSMRKKVCD IAAELARNLI DEDGNNQWPE GLKFLFDSVS SQNVGLREAA LHIFWNFPGI FGNQQQHYLD VIKRMLVQCM QDQEHPSIRT LSARATAAFI LANEHNVALF KHF