Immunogen sequence: LAALAFDASG TKLATASEKG TVIRVFSIPE GQKLFEFRRG VKRCVSICSL AFSMDGMFLS ASSNTETVHI FKLETVKEKP PEEPTTWTGY FGKVLMASTS YLPSQVTEMF NQGRAFATVR LPFCGHKNIC SLATIQKIPR LLVGAADGYL YMYNLDPQEG GECALMKQHR LDGSLETTNE ILDSASHDCP LVTQTYGAAA GKGTYVPSSP TRL