. "Authored: Garapati, P V, 2008-12-16 11:12:19"^^ . "Edited: Garapati, P V, 2008-12-16 11:12:19"^^ . "Reviewed: Bluestone, JA, Esensten, J, 2009-06-01 18:47:33"^^ . "Vav1, once activated by PIP3 binding and phosphorylation by Fyn, stimulates the GDP/GTP exchange activity of Rac. Vav1 is selective for Rac and catalyses exchange of bound GDP for GTP."^^ . . . . . . . "Activation of Rac1 by pVav1"^^ . . . . .