Research peptides 101

A short, plain-language primer on what a research peptide actually is, the form it ships in, the main compound families you'll encounter in the catalogue, and how we verify that what's in the vial is what the label says.

If you're new to working with these compounds, this is the right place to start. Everything below is background for a laboratory setting, it explains what the material is and how it's characterised, not how anything is used. For the legal framing that governs all of it, see Research use & safety.

What is a peptide?

A peptide is a short chain of amino acids, the same building blocks that make up proteins, just far fewer of them linked together. Where a protein might be hundreds or thousands of residues long, a peptide is typically a handful up to a few dozen. The exact sequence of amino acids defines the molecule's shape, and that shape defines what it can bind to.

Many naturally occurring peptides act as signalling molecules: they fit a specific receptor the way a key fits a lock, and that binding event is the unit of biology researchers study. Because the sequence is precisely defined, peptides can be synthesised to exact specifications and characterised down to their molecular weight, which is what makes them tractable subjects for in-vitro work.

What "research peptide" means

A research peptide is a synthesised peptide supplied strictly for in-vitro laboratory and research use. It is a reference material for experimental work, nothing more.

The distinction matters because it shapes how everything is packaged, labelled and documented. A research-grade material is defined by its purity, its identity and its traceability, the properties a laboratory needs to trust an experiment, and that's exactly what the rest of this page describes.

Why they ship as a powder

Almost every peptide in the catalogue arrives as a lyophilized powder. Lyophilisation is freeze-drying: the peptide is frozen and the water is removed under vacuum, leaving a dry, often fluffy or filmy solid in the bottom of the vial.

The reason is stability. In solution, peptides are vulnerable to hydrolysis, aggregation and microbial degradation; dry, they are far more stable and tolerate shipping and storage much better. A lyophilized vial is the long-term, transport-friendly form of the compound.

The main families at a glance

The catalogue spans several broad families, grouped by the kind of receptor or pathway they're studied against. This is a map, not a deep dive, each family is covered properly in The Science.

Purity & verification

A research material is only as good as its characterisation. Every batch is third-party tested before it ships, using two complementary methods:

• HPLC (high-performance liquid chromatography) measures purity, what fraction of the sample is the target peptide versus impurities. Our batches are verified to ≥98%.
• Mass spectrometry confirms identity, that the measured molecular weight matches the expected sequence, so you know it's the right molecule.

Each batch ships with a signed certificate of analysis (COA) and is fully lot-traceable, so any vial can be tied back to its test results. You can look any batch up on the COA page.