Effect of lipid infusion on phospho-IRS-1tyr612 (a), phospho-Akt (b), phospho-GSK3α (c), phospho-GSK3β (d) and phospho-AS160 (e). Data are expressed as a ratio of phosphorylated to total protein, in arbitrary units, as insulin-stimulated fold change over basal. Representative immunoblots are shown. Results are means ± SE (n = 9). *p < 0.05 vs saline infusion