LPS Testing as Part of Peptide COA Documentation
Lipopolysaccharide (LPS) testing is increasingly recognized as an essential component of comprehensive peptide quality documentation. Including endotoxin data on Certificates of Analysis gives researchers critical information for assessing a product's suitability for their specific applications.
What Is LPS?
Lipopolysaccharides are large molecules found in the outer membrane of gram-negative bacteria. Also known as endotoxins, these molecules are extremely stable — they resist heat, pH changes, and many sterilization procedures that effectively kill bacteria.
Why LPS Matters in Peptide Research
Even trace amounts of LPS contamination can activate immune cells, trigger inflammatory signaling cascades, and alter cellular behavior in ways that confound experimental results. For researchers working with cell cultures, immune assays, or any biological system sensitive to inflammatory stimuli, knowing the endotoxin status of their reagents is essential.
LPS Testing Methods on COAs
LAL Gel-Clot Assay: A qualitative or semi-quantitative method that detects endotoxins above a specified threshold.
Kinetic Chromogenic LAL: A quantitative method that measures endotoxin concentration in EU/mL with high sensitivity.
Recombinant Factor C (rFC): A newer, animal-free alternative that offers excellent specificity for LPS.
Reading LPS Data on a COA
When reviewing endotoxin data on a COA, look for:
- The method used — different methods have different sensitivity ranges
- The result — typically reported in EU/mL or EU/mg
- The specification limit — what threshold must be met for the batch to pass
- Pass/fail status — clear indication of whether the batch meets requirements
Evolve Aminos Documentation
We include endotoxin testing data as a standard component of our quality documentation, ensuring researchers have the information they need to make informed decisions about reagent suitability.