Immunogen sequence: MQEIIASVDH IKFDLEIAVE QQLGAQPLPF PGMDKSGAAV CEFFLKAACG KGGMCPFRHI SGEKTVVCKH WLRGLCKKGD QCEFLHEYDM TKMPECYFYS KFGECSNKEC PFLHIDPESK IKDCPWYDRG FCKHGPLCRH RHTRRVICVN YLVGFCPEGP SCKFMHPRFE LPMGTTEQPP LPQQTQPPAK QRTPQVIGVM QSQNSSAGNR GPR