Immunogen sequence: MGLLRIMMPP KLQLLAVVAF AVAMLFLENQ IQKLEESRSK LERAIARHEV REIEQRHTMD GPRQDATLDE EEDMVIIYNR VPKTASTSFT NIAYDLCAKN KYHVLHINTT KNNPVMSLQD QVRFVKNITS WKEMKPGFYH GHVSYLDFAK FGVKKKPIYI NVIRDPIERL VSYYYFLRFG DDYRPGLRRR KQGDKKTFDE CVAEGGSDCA PEK