Immunogen sequence: EEPPRDRALV DHENVISCPH LGASTKEAQS RCGEEIAVQF VDMVKGKSLT GVVNAQALTS AFSPHTKPWI GLAEALGTLM RAWAGSPKGT IQVITQGTSL KNAGNCLSPA VIVGLLKEAS KQADVNLVNA KLLVKEAGLN VTTSHSPAAP GEQGFGECLL AVALAGAPYQ AVGLVQGTTP VLQGLNGAVF RPEVPLRRDL PLLLFRTQTS DPA