Immunogen sequence: MSYDYHQNWG RDGGPRSSGG GYGGGPAGGH GGNRGSGGGG GGGGGGRGGR GRHPGHLKGR EIGMWYAKKQ GQKNKEAERQ ERAVVHMDER REEQIVQLLN SVQAKNDKES EAQISWFAPE DHGYGTEVST KNTPCSENKL DIQEKKLINQ EKKMFRIRNR SYIDRDSEYL LQENEPDGTL DQKLLEDLQK KKNDLRYIEM QHFREKLPSY GMQ