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Thionein

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Thionein is a cysteine-rich coenzyme associated with metallothioneins. Thionein and metallothionein act as a redox pair, and much of the antioxidant functions of attributed to metallothionein are actually due to thionein. The binding of heavy metal ions to both thionein and metallothionein is due to their high cysteine content.

References

^ Wolfgang m (2003). "Cellular zinc and redox states converge in the metallothionein/thionein pair". Journal of Nutrition. 133 (5 Suppl 1): 1460S–142SS. doi:10.1093/jn/133.5.1460S. PMID 12730443.
Palacios O, Atrian S, Capdevila, M (2011). "Zn- and Cu-thioneins: a functional classification for metallothioneins?". Journal of Biological Inorganic Chemistry. 16 (7): 991–1009. doi:10.1007/s00775-011-0827-2. PMID 21823038. S2CID 26786966.

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