Immunogen sequence: MTVEQNVLQQ SAAQKHQQTF LNQLREITGI NDTQILQQAL KDSNGNLELA VAFLTAKNAK TPQQEETTYY QTALPGNDRY ISVGSQADTN VIDLTGDDKD DLQRAIALSL AESNRAFRET GITDEEQAIS RVLEASIAEN KACLKRTPTE VWRDSRNPYD RKRQDKAPVG LKNVGNTCWF SAVIQSLFNL LEFRRLVLNY KPPSNAQDLP RNQ