The p110beta isoform of phosphoinositide 3-kinase signals downstream of G protein-coupled receptors and is functionally redundant with p110gamma - Guillermet-Guibert, J; Bjorklof, K; Salpekar, A; Gonella, C; Ramadani, F; Bilancio, A; Meek, S; Smith, A J; Okkenhaug, K; Vanhaesebroeck, B (Proc Natl Acad Sci USA, 2008)