"yrosine phosphorylation of SGEF suppresses its interaction with RhoG the elevation of RhoG activity and SGEF-mediated promotion of cell migration. We identified tyrosine 530 (Y530) which is located within the Dbl homology domain as a major phosphorylation site of SGEF by Src and Y530F mutation blocked the inhibitory effect of Src on SGEF"xsd:string