Understanding how research peptides are produced helps explain why purity and quality control matter. This is a high-level, non-technical overview.
Solid-phase peptide synthesis
Most research peptides are made using solid-phase peptide synthesis (SPPS). The peptide chain is built one amino acid at a time on a solid resin support, in a precise, repeating cycle.
Because the sequence is assembled deliberately, the resulting molecule has a known, defined structure — which is what makes it useful as a research reference material.
Purification
After synthesis, the crude peptide is cleaved from the resin and purified, commonly using preparative HPLC to separate the target peptide from by-products of the synthesis.
The level of purification achieved is later confirmed by analytical HPLC and reported on the Certificate of Analysis.
Quality control
Identity is confirmed (typically by mass spectrometry) and purity measured (by HPLC) before a batch is released. This documentation is what lets researchers trust the material.
Learn more about reading the results in our guide to the Certificate of Analysis, or browse tested products on our research peptides page. All products are for laboratory research use only.
This guide is for general educational purposes only and describes laboratory research practice. Stratum products are supplied for laboratory research use only — not for human or animal consumption. See our research use disclaimer.