Immunogen sequence: MAGRGGAARP NGPAAGNKIC QFKLVLLGES AVGKSSLVLR FVKGQFHEYQ ESTIGAAFLT QTVCLDDTTV KFEIWDTAGQ ERYHSLAPMY YRGAQAAIVV YDITNTDTFA RAKNWVKELQ RQASPNIVIA LAGNKADLAS KRAVEFQEAQ AYADDNSLLF METSAKTAMN VNEIFMAIAK KLPKNEPQNA TGAPGRNRGV DLQENNPASR SQC