Author Retains CopyrightReeve, John Edward2009-04-142022-10-092009-04-142022-10-0919701970https://ir.wgtn.ac.nz/handle/123456789/21433The naturally occurring S-substituted-L-cysteines have the following general structure:- They have been found in plant, animal and microbiological sources either as the free amino acid, the sulphoxide of the amino acid, a γ-glutamyl dipeptide or as a glutathione conjugate. To date, they have not been found incorporated into proteins and their physiological importance is not known.pdfen-NZhttps://www.wgtn.ac.nz/library/about-us/policies-and-strategies/copyright-for-the-researcharchiveChemistryTextAll rights, except those explicitly waived, are held by the Author