Immunogen sequence: IDMPAINKGN KKVTEEDFYK LVSEFTITKG LRGAKTTFDV YTESWAQDPS QENKKKTVVD FETDVLFLVP TEIALAQHRA NAKSAKTYAY LFSHPSRMPV YPKWVGADHA DDIQYVFGKP FATPTGYRPQ DRTVSKAMIA YWTNFAKTGD PNMGDSAVPT HWEPYTTENS GYLEITKKMG SSSMKRSLRT NFLRYWTLTY L. Caboxyl Est