Item Parental high ARA levels are associated with differential expression of genes involved in methionine cycle, transsulfuration pathway, and glutamate and glutathione metabolism in male F1 livers. Public Library of Transsulfuration Activity Can Support Cell Growth upon Extracellular Cysteine Limitation: Cell Metabolism Glutathione: Physiological and Clinical Relevance Restorative Medicine Frontiers Pathological role of methionine in the initiation and progression of biliary atresia One lab marker could reveal your risk for heart disease, brain decline, and poor detoxand most people have never heard of it.