Immunogen sequence: KNHALVTSAN STEAADSAFL PTEDESLSTM SCEMLTEQTP SSDPENALEV NGAEVTGEKE NHCDDKTCVP STSAEDMSEN VPIAEDTTEQ P. Substrate-binding subunit of the Rab geranylgeranyltransferase (GGTase) complex. Binds unprenylated Rab proteins and presents the su