---
title: "Leucine: research glossary | Sable Peptides"
description: "Leucine (three-letter code Leu, one-letter code L) is a branched-chain amino acid with a hydrophobic isobutyl side chain. It strongly favours helical struc"
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publisher: Sable Peptides Limited (UK company 17488610)
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---

Glossary

# Leucine

Leucine (three-letter code Leu, one-letter code L) is a branched-chain amino acid with a hydrophobic isobutyl side chain. It strongly favours helical structures and contributes to hydrophobic interactions. Leucine is isobaric with isoleucine, so the two cannot be distinguished by simple mass measurement.

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

## Related terms

-   [Amino acid](/glossary/amino-acid)
-   [One-letter code](/glossary/one-letter-code)
-   [Isoleucine](/glossary/isoleucine)
-   [Isobaric](/glossary/isobaric)

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