Immunogen sequence: AVPVSTSKPS SDLLDLQPDF SSGGAAAAAA PAPPPPAGGA TAWGGFGGSF MAPSPSPVTP AQNNLLQPNF EAAFGTTPST SSSSSFDPSV FDGLGDLLMP TMAPAGQPAP VSMVPPSPAM AASKALGSDL DSSLASLVGN LGISGTTTKK GDLQWNAGEK KLTGGANWQP KVAPATWSAG VPPSAPLQGA VPPTSSVPPV AGAPSVGQPG AGF