Immunogen sequence: MAGTVVLDDV ELREAQRDYL DFLDDEEDQG IYQSKVRELI SDNQYRLIVN VNDLRRKNEK RANRLLNNAF EELVAFQRAL KDFVASIDAT YAKQYEEFYV GLEGSFGSKH VSPRTLTSCF LSCVVCVEGI VTKCSLVRPK VVRSVHYCPA TKKTIERRYS DLTTLVAFPS SSVYPTKDEE NNPLETEYGL SVYKDHQTIT IQEMPEKAPA GQL