---
title: "LAL assay: research glossary | Sable Peptides"
description: "The Limulus amebocyte lysate (LAL) assay is a test for bacterial endotoxin based on an extract of blood cells from the horseshoe crab, which clots in the p"
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publisher: Sable Peptides Limited (UK company 17488610)
note: Research use only. Not for human or veterinary use.
---

Glossary

# LAL assay

The Limulus amebocyte lysate (LAL) assay is a test for bacterial endotoxin based on an extract of blood cells from the horseshoe crab, which clots in the presence of lipopolysaccharide. Gel-clot, turbidimetric and chromogenic formats are available. Results are expressed in endotoxin units per millilitre or per milligram.

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

## Related terms

-   [Milligram](/glossary/milligram)
-   [Millilitre](/glossary/millilitre)
-   [Endotoxin](/glossary/endotoxin)

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