---
title: "Glutamine: research glossary | Sable Peptides"
description: "Glutamine (three-letter code Gln, one-letter code Q) is a polar amino acid with a side-chain carboxamide one carbon longer than that of asparagine. Glutami"
canonical: https://www.sablepeptides.co.uk/glossary/glutamine
publisher: Sable Peptides Limited (UK company 17488610)
note: Research use only. Not for human or veterinary use.
---

Glossary

# Glutamine

Glutamine (three-letter code Gln, one-letter code Q) is a polar amino acid with a side-chain carboxamide one carbon longer than that of asparagine. Glutamine can deamidate and, at the N-terminus, can cyclise to pyroglutamate. Its side chain is typically trityl protected during Fmoc peptide synthesis.

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

## Related terms

-   [Peptide](/glossary/peptide)
-   [Amino acid](/glossary/amino-acid)
-   [N-terminus](/glossary/n-terminus)
-   [Pyroglutamate](/glossary/pyroglutamate)
-   [One-letter code](/glossary/one-letter-code)
-   [Asparagine](/glossary/asparagine)

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