Immunogen sequence: PVCGRPLANQ GSLRNHMRLH TGEKPFLCPH CGRAFRQRGN LRGHLRLHTG ERPYRCPHCA DAFPQLPELR RHLISHTGEA HLCPVCGKAL RDPHTLRAHE RLHSGERPFP CPQCGRAYTL ATKLRRHLKS HLEDKPYRCP TCGMGYTLPQ SLRRHQLSHR PEAPCSPPSV PSAASEPTVV LLQAEPQLLD THREEEVSPA RDVVEVTISE SQE