Immunogen sequence: ELAAQLEKKR DDFCKQNQEA SSDRCSALLQ VIFSPLEEEV KAGIYSKPGG YRLFVQKLQD LKKKYYEEPR KGIQAEEILQ TYLKSKESMT DAILQTDQTL TEKEKEIEVE RVKAESAQAS AKMLQEMQRK NEQMMEQKER SYQEHLKQLT EKMENDRVQL LKEQERTLAL KLQEQEQLLK EGFQKESRIM KNEIQDLQTK MRRRKACTIS; Po