. "Authored: Garapati, P V, 2011-07-11"^^ . "Edited: Garapati, P V, 2011-07-11"^^ . "Reviewed: R\u00F6nnstrand, L, 2011-08-22"^^ . "Vav1, once activated by PIP3 binding and phosphorylation by Src kinases, stimulates the GDP/GTP exchange activity of Rac. Vav1 is selective for Rac and catalyses exchange of bound GDP for GTP."^^ . . . . . . . "Activation of RAC1"^^ . . . . . . . .