Immunogen sequence: IVRCEHDGVM TGANGEVSFI NIKTLNEWDS RHCNGVDWRQ KLDSQRGAVI ATELKNNSYK LARWTCCALL AGSEYLKLGY VSRYHVKDSS RHVILGTQQF KPNEFASQIN LSVENAWGIL RCVIDICMKL EEGKYLILKD PNKQVIRVYS LPDGTFSSDE DEEE Highest antigen sequence identity to the following or