Immunogen sequence: MPNWGGGKKC GVCQKTVYFA EEVQCEGNSF HKSCFLCMVC KKNLDSTTVA VHGEEIYCKS CYGKKYGPKG YGYGQGAGTL STDKGESLGI KHEEAPGHRP TTNPNASKFA QKIGGSERCP RCSQAVYAAE KVIGAGKSWH KACFRCAKCG KGLESTTLAD KDGEIYCKGC YAKNFGPKGF GFGQGAGALV HSE; Positive Samples: A-