Immunogen sequence: MAPWGKRLAG VRGVLLDISG VLYDSGAGGG TAIAGSVEAV ARLKRSRLKV RFCTNESQKS RAELVGQLQR LGFDISEQEV TAPAPAACQI LKEQGLRPYL LIHDGVRSEF DQIDTSNPNC VVIADAGESF SYQNMNNAFQ VLMELEKPVL ISLGKGRYYK ETSGLMLDVG PYMKALEYAC GIKAEVVGKP SPEFFKSALQ AIGVEAHQAV MIG