Immunogen sequence: MCVCQTMEVG QYGKNASRAG DRGVLLEPFI HQVGGHSSMM RYDDHTVCKP LISREQRFYE SLPPEMKEFT PEYKGVVSVC FEGDSDGYIN LVAYPYVESE TVEQDDTTER EQPRRKHSRR SLHRSGSGSD HKEEKASLSL ETSESSQEAK SPKVELHSHS EVPFQMLDGN SGLSSEKISH NPWSLRCHKQ QLSRMRSESK DRKLYKFLLL ENV