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What Are Research Peptides?
A plain-language primer on research peptides, how they are made and tested, and what research-use-only means.
Peptides are short chains of amino acids linked by peptide bonds. Where proteins can run to hundreds or thousands of residues, most peptides used in the laboratory are between two and fifty amino acids long. That smaller size makes them straightforward to synthesise, characterise, and store as reference materials.
How they are made
Most research peptides are produced by solid-phase peptide synthesis (SPPS), in which the chain is assembled one amino acid at a time on a solid resin. After cleavage and purification, the material is freeze-dried (lyophilised) into a stable powder that can be stored cold for long periods.
How purity is verified
Two analytical methods do the heavy lifting. High-performance liquid chromatography (HPLC) separates the sample so the target peptide can be quantified against impurities, giving the purity percentage you see on a Certificate of Analysis. Mass spectrometry (MS) confirms identity by measuring molecular weight. Reputable suppliers publish both per batch.
What research use only means
Research-use-only (RUO) materials are sold for in-vitro laboratory work only. They are not drugs, supplements, or medical devices, and are not intended for human or veterinary use. Regulations differ by country, and it is the buyer's responsibility to confirm that ordering and possession are lawful where they are.