Immunogen sequence: PKLDKNPNLG EDQAEEISDE LMEFSLKDQE AKVSRSGLYR SPSMPENLNR PRLKQVEKFK DNTIPDKVKK KYFSGQGKLR KGLCLKKTVS LCDITITQML EEDSNQGHLI GDFSKVCALP TVSGKHQDLK YVNPETVAAL LSGKFQGLIE KFYVIDCRYP YEYLGGHIQG ALNLYSQEEL FNFFLKKPIV PLDTQKRIII VFHCEFSSER GPR