<prompt> Which of the following is NOT an anti oxidant?CeruloplasminTransferrinCatalaseElastase  <response>: Serum, tissue fluids, and host cells possess antioxidant mechanisms that protect against these potentially harmful oxygen-derived radicals. They include 1 the enzyme superoxide dismutase, which is found in or can be activated in a variety of cell types; 2 the enzyme catalase, which detoxifies H2O2; 3 glutathione peroxidase, another powerful H2O2 detoxifier; 4 the copper-containing serum protein ceruloplasmin; and 5 the iron-free fraction of serum transferrin. Thus, the influence of oxygen-derived free radicals in any given inflammatory reaction depends on the balance between production and inactivation of these metabolites by cells and tissues. Ref: Robbins 8th edition, Chapter 2. 