Immunogen sequence: SGMLSVLGQP QSKFNFACLE AREHCKSLGI ENPVCEVSNY LFPDCRVISG HQEALRFLQK NSSKFHFRRT RMLPVSGAFH TRLMEPAVEP LTQALKAVDI KKPLVSVYSN VHAHRYRHPG HIHKLLAQQL VSPVKWEQTM HAIYERKKGR GFPQTFEVGP GRQLGAILKS CNMQAWKSYS AVDVLQTLEH VDLDPQEPPR; Positive Samp