Effect of glucagon on insulin receptor substrate-1 (IRS-1) phosphorylation and association with phosphatidylinositol 3-kinase (PI 3-kinase) Saad, M.J.; Hartmann, L.G.; de Carvalho, D.S.; Galoro, C.A.; Brenelli, S.L.; Carvalho, C.R. FEBS Letters 370(1-2): 131-134 1995 0014-5793 10.1016/0014-5793(95)00809-n https://eurekamag.com/research/008/532/008532941.php