Immunogen sequence: TCTKHTYRCL NGLCLSKGNP ECDGKEDCSD GSDEKDCDCG LRSFTRQARV VGGTDADEGE WPWQVSLHAL GQGHICGASL ISPNWLVSAA HCYIDDRGFR YSDPTQWTAF LGLHDQSQRS APGVQERRLK RIISHPFFND FTFDYDIALL ELEKPAEYSS MVRPICLPDA SHVFPAGKAI WVTGWGHTQY GGTGALILQK GEIRVINQTT CEN