Immunogen sequence: MAAQCVRLAR RSLPALALSL RPSPRLLCTA TKQKNSGQNL EEDMGQSEQK ADPPATEKTL LEEKVKLEEQ LKETVEKYKR ALADTENLRQ RSQKLVEEAK LYGIQAFCKD LLEVADVLEK ATQCVPKEEI KDDNPHLKNL YEGLVMTEVQ IQKVFTKHGL LKLNPVGAKF DPYEHEALFH TPVEGKEPGT VALVSKVGYK LHGRTLRPAL VGV