Frontiers Redox regulation of enzymes involved in sulfate assimilation and in the synthesis of sulfur containing amino acids and glutathione in plants GLUTATHIONEPathway for the biosynthesis of glutathione ** Glutathione is the body's most important antioxidant. Glutathione is made by the coming together chemically of three amino acids. The "Transmethylation Pathway" starts with Homocysteine Amino Acid Derivatives biochemistry Amino Acid Metabolism for Human Physiology Springer Nature Link