---
title: "Oxidation: research glossary | Sable Peptides"
description: "Oxidation is the loss of electrons by a species, often involving gain of oxygen. In peptides, methionine readily oxidises to methionine sulfoxide (+16 Da),"
canonical: https://www.sablepeptides.co.uk/glossary/oxidation
publisher: Sable Peptides Limited (UK company 17488610)
note: Research use only. Not for human or veterinary use.
---

Glossary

# Oxidation

Oxidation is the loss of electrons by a species, often involving gain of oxygen. In peptides, methionine readily oxidises to methionine sulfoxide (+16 Da), and cysteine can form disulfides or sulfonic acids. Tryptophan is also susceptible. Storing peptides dry, cold, protected from light and under inert gas helps limit oxidative degradation.

Source: [en.wikipedia.org](https://en.wikipedia.org/wiki/Redox)

## Related terms

-   [Inert gas](/glossary/inert-gas)
-   [Tryptophan](/glossary/tryptophan)
-   [Cysteine](/glossary/cysteine)
-   [Methionine](/glossary/methionine)

[Back to glossary A–Z](/glossary/terms)

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