Immunogen sequence: MARHRNVRGY NYDEDFEDDD LYGQSVEDDY CISPSTAAQF IYSRRDKPSV EPVEEYDYED LKESSNSVSN HQLSGFDQAR LYSCLDHMRE VLGDAVPDEI LIEAVLKNKF DVQKALSGVL EQDRVQSLKD KNEATVSTGK IAKGKPVDSQ TSRSESEIVP KVAKMTVSGK KQTMGFEVPG VSSEENGHSF HTPQKGPPIE DAIASSDVLE TAS