Kokumi! If you want a whole picture on umami, there's the core concept of glutamate, then a second level of umami boosting from ribonucleotides like IMP. There's a third layer that's not Antioxidant Potential of Glutathione and Crosstalk with Phytohormones in Enhancing Abiotic Stress Tolerance in Crop Plants Structure of the tripeptide glutathione (GSH). Glutamic acid (Glu) is Download Scientific Diagram Molecular basis for redox control by the human cystine glutamate antiporter system xc Nature Communications Glutathione System from Cyanobacteria to Higher Eukaryotes Encyclopedia MDPI