SOD activity in refractory epilepsy was studied for the first time
Most cells in the body have an outer membrane bound enzyme (gamma-glutamyltransferase) [1] which starts this process by breaking glutathione down to its constituent amino acids (protein building blocks)

Decoding the Proteome: The Algorithmic Logic of Tandem Mass Spectrometry and Statistical Validation in Protein Identification Protein Quantification Techniques: A Technical Guide to Label-Free, SILAC, iTRAQ, and TMT Methods for Proteomics Research The Principle, Characteristics and Application of Peptide Mass Fingerprinting Introduce to Protein DigestionIn-Gel or In-Solution Top-Down Proteomics vs Bottom-Up Proteomics Label-based Protein Quantification TechnologyiTRAQ, TMT, SILAC SDS-PAGE Work: Principles, Protocols, and Applications in Protein Analysis Four Chromatographic Separation Techniques Accurate Mass Measurement Mass Spectrometry Exosomes and Cancer Progression Glycosylation in Health and Disease Introduction on Selected / Multiple Reaction Monitoring and Parallel Reaction Monitoring Label-Free Quantification Technique Polyacrylamide Gel Electrophoresis (PAGE): Principles, Methods, Protocol, and Applications Decoding Protein Topology: The Chemistry of Disulfide Bond Formation and Advanced Mass Spectrometric Mapping Isoelectric Point of Amino Acids: Calculation Principles, Practical Determination Methods, and Applications in Protein Researc Protein Amino Acid Analysis-Techniques, Instruments, and Applications What is Proteomics

Biol Plant 49:305308 Lascano HR, Gomez LD, Casano LM, Trippi VS (1998) Changes in glutathione reductase activity and protein content in wheat leaves and chloroplasts exposed to photooxidative stress