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Reduced level of the enzyme glutathione synthetase, which catalyzes the last step in the synthesis of glutathione and a deficiency results in low levels of glutathione. Acidosis is due to reduced feedback inhibition of gamma-glutamyl cysteine synthetase in the gamma-glutamyl cycle, which ultimately leads to overproduction and accumulation of 5-oxoproline. [PMID:17397529]
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