Glutamine and Its Actions: A Bird's Eye View Glycine as a conditionally essential amino acid and its relationship to l serine Metabolism Clinical and Experimental Disrupting Mitochondrial Pyruvate Uptake Directs Glutamine into the TCA Cycle away from Glutathione Synthesis and Impairs Hepatocellular Tumorigenesis: Cell Reports Hepatic Glutathione Synthesis: The Liver's Antioxidant Powerhouse Glutathione (GSH) is the most abundant intracellular antioxidantand the liver is its primary production site. Through a tightly regulated, ATP dependent pathway, hepatocytes