Immunogen sequence: LPEKYSQNIY IQNRNIQTDN NKSIGCFGSR SRKVKEQYQD VPMPEEKSNP KGVEWLWHSI VIRMYLSLIA KSVRNYTQEA SLGALQNLTA GSGPMPTSVA QTVVQKESGL QHTRKMLHVG DPSVKKTAIS LLRNLSRNLS LQNEIAKETL PDLVSIIPDT VPSTDLLIET TASACYTLNN IIQNSYQNAR DLLNTGGIQK IMAISAGDAY ASN