Immunogen sequence: MSSSVEQKKG PTRQRKCGFC KSNRDKECGQ LLISENQKVA AHHKCMLFSS ALVSSHSDNE SLGGFSIEDV QKEIKRGTKL MCSLCHCPGA TIGCDVKTCH RTYHYHCALH DKAQIREKPS QGIYMVYCRK HKKTAHNSEA ADLEESFNEH ELEPSSPKSK KKSRKGRPRK TNFKGLSEDT RSTSSHGTDE MESSSYRDRS PHRSSPSDTR PKC