Immunogen sequence: MEEETHTDAK IRAENGTGSS PRGPGCSLRH FACEQNLLSR PDGSASFLQG DTSVLAGVYG PAEVKVSKEI FNKATLEVIL RPKIGLPGVA EKSRERLIRN TCEAVVLGTL HPRTSITVVL QVVSDAGSLL ACCLNAACMA LVDAGVPMRA LFCGVACALD SDGTLVLDPT SKQEKEARAV LTFALDSVER KLLMSSTKGL YSDTELQQCL AAA