Immunogen sequence: MSRSRQPPLV TGISPNEGIP WTKVTIRGEN LGTGPTDLIG LTICGHNCLL TAEWMSASKI VCRVGQAKND KGDIIVTTKS GGRGTSTVSF KLLKPEKIGI LDQSAVWVDE MNYYDMRTDR NKGIPPLSLR PANPLGIEIE KSKFSQKDLE MLFHGMSADF TSENFSAAWY LIENHSNTSF EQLKMAVTNL KRQANKKSEG SLAYVKGGLS TFF