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Indeed, the interconversion of serine and glycine, via the involvement of THF, represents a major pathway for the generation of 5,10-methylene-THF which is a member of the active folate pool

For instance, the total NADP(H) is about 420 nmol/g wet weight in rat liver and 59% of total NADP(H) is found in mitochondria, and 30 nmol/g wet weight in skeletal muscle, 5,8 and the NADPH concentration in the cytosol is 3.1 0.3 and 37 2 M in the mitochondrial matrix in HeLa cells

Evidence that the enzymes themselves can be modified by redox-related processes such as S -nitrosylation (Romero-Puertas and Sandalio 2016), in addition to the transcriptional control of the genes encoding them, emphasizes the intricacy of the checks and balances operating to maintain redox homeostasis within the cellular environment

Cancer cell 3 (3), 285296