Immunogen sequence: MVDKNIYIIQ GEINIVVGAI KRNARWSTHT PLDEERDPLL HSFGHLKEVL NSITELSEIE PNVFLRPFLE VIRSEDTTGP ITGLA. This gene encodes a member of the Sec7 domain family. The encoded protein is a guanine nucleotide exchange factor that regulates the recrui