Immunogen sequence: PARLHRIVPR LRDVFGWGNL TCPICKGLFT AINLGLKKEP NVARVGSVAI KLCNLLKIAP PAVCQSIVHL FEDDMVEVWR RSVLSPSEAC GLLLGSTCGH WDIFSSWNIS LPTVPKPPPK PPSPPAPGAP VSRILFLTDL HWDHDYLEGT DPDCADPLCC RRGSGLPPAS RPGAGYWGEY SKCDLPLRTL ESLLSGLGPA GPFDMVYWTG DIP