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Why high levels of the amino acid cysteine are toxic to cells

September 18, 2026 Phys.org 1 min read
Phys.org · Center
Why high levels of the amino acid cysteine are toxic to cells

Cysteine is one of the main building blocks that cells use to make proteins. But this amino acid is a double-edged sword—too much cysteine is toxic to the cell. Cells therefore keep free cysteine levels to a minimum, converting most of the amino acid into the antioxidant glutathione.

Source: Phys.org

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