Immunogen sequence: KRLASNYLNN PLFLTARANE DPCWKNEITH DEHCAACKRG ANLQPCGTCP GAYHLSCLEP PLKTAPKGVW VCPRCQQKAL KKDEGVPWTG MLAIVHSYVT HKTVKEEEKQ KLLQRGSELQ NEHQQLEERD RRLASAVQKC LELKTSLLAR QRGTQSSLDR LRALLRLIQG EQLLQVTMTT TSPAPLLAGP WTKPSVAATH PTVQHPQGHN; Po