PDGF stimulates an increase in GTP-Rac via activation of phosphoinositide 3-kinase - Hawkins, P T; Eguinoa, A; Qiu, R G; Stokoe, D; Cooke, F T; Walters, R; Wennstrom, S; Claesson-Welsh, L; Evans, T; Symons, M; Stephens, L (Curr Biol, 1995)