Immunogen sequence: MGTTASTAQQ TVSAGTPFEG LQGSGTMDSR HSVSIHSFQS TSLHNSKAKS IIPNKVAPVV ITYNCKEEFQ IHDELLKAHY TLGRLSDNTP EHYLVQGRYF LVRDVTEKMD VLGTVGSCGA PNFRQVQGGL TVFGMGQPSL SGFRRVLQKL QKDGHRECVI FCVREEPVLF LRADEDFVSY TPRDKQNLHE NLQGLGPGVR VESLELAIRK EIH