Immunogen sequence: VELSVLFCKFI QSIPDNQLVR QKLNCMTKIV ESTLFRQSEC REVLLPLLTD QLSGQLDDNS NKPDHEASSQ LL Highest antigen sequence identity to the following orthologs - mouse 92%, rat 92%. Guanine nucleotide exchange factor (GEF) for Rho and Rac. GEF proteins