Immunogen sequence: MSGWADERGG EGDGRIYVGN LPTDVREKDL EDLFYKYGRI REIELKNRHG LVPFAFVRFE DPRDAEDAIY GRNGYDYGQC RLRVEFPRTY GGRGGWPRGG RNGPPTRRSD FRVLVSGLPP SGSWQDLKDH MREAGDVCYA DVQKDGVGMV EYLRKEDMEY ALRKLDDTKF RSHEGETSYI RVYPERSTSY GYSRSRSGSR GRDSPYQSRG SPH