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Pep talk: Selenoglutathione (GSeH) and other peptides containing selenocysteine with an amino acid sequence of the glutathione peroxidase (GPx) active site are obtained in the oxidized form by solid‐phase peptide synthesis. Their GPx activity against hydrogen peroxide (see picture) reveals that GSeH has effective antioxidant activity in addition to the biological function of a glutathione analogue.
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