Immunogen sequence: MMAIRELKVC LLGDTGVGKS SIVCRFVQDH FDHNISPTIG ASFMTKTVPC GNELHKFLIW DTAGQERFHS LAPMYYRGSA AAVIVYDITK QDSFYTLKKW VKELKEHGPE NIVMAIAGNK CDLSDIREVP LKDAKEYAES IGAIVVETSA KNAINIEELF QGISRQIPPL DPHENGNNGT IKVEKPTMQA SRRCC. Small GTP-binding