Immunogen sequence: MLTRKIKLWD INAHITCRLC SGYLIDATTV TECLHTFCRS CLVKYLEENN TCPTCRIVIH QSHPLQYIGH DRTMQDIVYK LVPGLQEAEM RKQREFYHKL GMEVPGDIKG ETCSAKQHLD SHRNGETKAD DSSNKEAAEE KPEEDNDYHR SDEQVSICLE CNSSKLRGLK RKWIRCSAQA TVLHLKKFIA KKLNLSSFNE LDILCNEEIL GKD