ROS production from oxidative stress. Locations at which ROS are produced. There are several distinct locations within a cell that are capable of producing ROS. The vast majority of them may be found in the mitochondrial surroundings. Glyceraldehyde-3-phosphate (GAPDH), diacylglycerol:acyltransferase (DGAT), diacylglycerol (DAG), triacylglycerol (TAG), peroxynitrite (ONOO−), nitric oxide (NO), protein kinase C (PKC), glutathione peroxidase (GPx), superoxide dismutase (SOD), glutathione (GSH), GSH/oxidized glutathione (GSSH), electron transport chain (ETC), inducible nitric oxide synthase (iNOS).