Immunogen sequence: MALKKSSPSL DSGDSDSEEL PTFAFLKKEP SSTKRRQPER EEKIVVVDIS DCEASCPPAP ELFSPPVPEI AETVTQTQPV RLLSSESEDE EEFIPLAQRL TCKFLTHKQL SPEDSSSPVK SVLDHQNNEG ASCDWKKPFP KIPEVPLHDT PERSAADNKD LILDPCCQLP AYLSTCPGQS SSLAVTKTNS DILPPQKKTK PSQKVQGRGS HGC