Abstract
Reactive oxygen species -ROS are produced by the oxidation-reduction processes of some enzymes as a product of the energy metabolism of cells and organelles and by exogenous sources. The mechanisms of oxidation-reduction and the enzymatic kinetics of some ROS source enzymes are presented here, as well as the mechanisms related to ROS production in organelles and cells and exogenous sources such as Fe, Cd, Hg, Ni, Zn, among others and xenobiotics such as paraquat-PQ.
Keywords: Cytochrome C, Electron transfer, Enzymatic kinetics, Enzymatic oxidation, Galactose Oxidase, Haber – Weiss reactions, Heavy metal contamination, Microsomes, Paraquat, Reaction centre, Xanthine oxidase, Xenobiotics.
