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what is selenium-glutathione peroxidase Simplified catalytic mechanism of the glutathione peroxidase: in the Glutathione peroxidase - Wikipedia
Description
NAC specifically works on a protein that controls glutamate activity (the cystine/glutamate antiporter) resulting in reduced glutamate damage

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This can potentially fortify the body's defenses against oxidative stress, a common factor in aging and everyday health conditions.* Provides Immune System Support: By bolstering the body's natural defense mechanisms, NAC provides immune support through a number of mechanisms.* Supports Respiratory Function: NAC can potentially provide support for respiratory function through its mucus-targeting properties, which can aid in the everyday removal of mucus from the airways, easing typical breathing discomfort
However, as observed in the difference maps, a strong local negative/positive peak pair was observed in the vicinity of the GSH and could be interpreted as a movement of the Y138 side chain (Fig