Immunogen sequence: GITSINCSGD MWVEPGEIFQ MGMNVSIYCQ EALKHCRPRN LYFYKNGFKE EFDITRINRT TARIWYKGFS EPHAYMHCTA ECPGHFQETL ICGKDISSGH PPDAPSNLTC VIYEYSGNMT CTWNTGKPTY IDTKYIVHVK SLETEEEQQY LASSYVKIST DSLQGSRKYL VWVQAVNSLG MENSQQLHVH LDDIVIPSAS IISRAETTND TVP