---
title: "Tryptophan: research glossary | Sable Peptides"
description: "Tryptophan (three-letter code Trp, one-letter code W) is an aromatic amino acid with an indole side chain. It is the strongest UV absorber among standard a"
canonical: https://www.sablepeptides.co.uk/glossary/tryptophan
publisher: Sable Peptides Limited (UK company 17488610)
note: Research use only. Not for human or veterinary use.
---

Glossary

# Tryptophan

Tryptophan (three-letter code Trp, one-letter code W) is an aromatic amino acid with an indole side chain. It is the strongest UV absorber among standard amino acids at 280 nm and is intrinsically fluorescent. Tryptophan is susceptible to oxidation and to alkylation during peptide cleavage without suitable scavengers.

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

## Related terms

-   [Peptide](/glossary/peptide)
-   [Amino acid](/glossary/amino-acid)
-   [Cleavage](/glossary/cleavage)
-   [Oxidation](/glossary/oxidation)
-   [One-letter code](/glossary/one-letter-code)

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