Immunogen sequence: NLTWQSRTQD EHPKTMFSKD KDIIPFIDKY WECMTTRQRP GKMTWPNNIV KTMSKERDVF LVKEHPDPGS KDPEEDYPKF GLLDQDLSNI GPAYDNQKQS SAVSTSGNLN GGIAAGSSGK GRGAKRKQQD GGTTGTTKKA RSDPLFSAQR LPPHGYPLEH PFNKDGYRYI LAEPDPHAPD PEKLELDCWA GKPIPGDLYR; Positive Samp