Homocysteine Excess and Vascular Endothelium Dysfunction: Delineating the Pathobiological Mechanisms Glutathione is often discussed as a key antioxidant within the body. It is present at a cellular level and plays a role in oxidative processes. Levels may be influenced by factors such Scheme 2. a) Rationale for the assisting inhibiting roles of Download Scientific Diagram Constructing a FRET based molecular chemodosimeter for cysteine over homocysteine and glutathione by naphthalimide and phenazine derivatives Analyst (RSC Publishing)