---
title: "Residue: research glossary | Sable Peptides"
description: "In peptide chemistry, a residue is the part of an amino acid that remains once it has been incorporated into a chain, after losing the elements of water du"
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publisher: Sable Peptides Limited (UK company 17488610)
note: Research use only. Not for human or veterinary use.
---

Glossary

# Residue

In peptide chemistry, a residue is the part of an amino acid that remains once it has been incorporated into a chain, after losing the elements of water during peptide bond formation. Peptide length is counted in residues, so a decapeptide contains ten residues, and residue masses rather than free amino acid masses are summed to calculate molecular weight.

Source: [en.wikipedia.org](https://en.wikipedia.org/wiki/Residue_\(chemistry\))

## Related terms

-   [Peptide](/glossary/peptide)
-   [Amino acid](/glossary/amino-acid)
-   [Peptide bond](/glossary/peptide-bond)
-   [Molecular weight](/glossary/molecular-weight)

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

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