Immunogen sequence: LTITTLYCCR RRKQWKNKKR ESAAVTLTTL PSELLLDRLH PNPMYQRMPL LLNPKLLSLE YPRNNIEYVR DIGEGAFGRV FQARAPGLLP YEPFTMVAVK MLKEEASADM QADFQREAAL MAEFDNPNIV KLLGVCAVGK PMCLLFEYMA YGDLNEFLRS MSPHTVCSLS HSDLSMRAQV SSPGPPPLSC AEQLCIARQV AAGMAYLSER KFV