Brexton Bio Labs
Process

From synthesis to your bench.

Three fixed steps, in order, for every lot we release.

01

Synthesis

Every peptide starts with solid-phase peptide synthesis (SPPS), the standard method for building peptides one amino acid at a time in an exact, predetermined sequence. Each chain is assembled on a resin support, then cleaved, purified by high-performance liquid chromatography (HPLC), and freeze-dried (lyophilized) into a stable powder.

The result is a compound built to its intended structure, not approximated. Production is the foundation. Everything after it, from testing to verification, exists to prove it was done right.

02

HPLC/MS Testing

After production, every batch is analyzed with two complementary methods. High-performance liquid chromatography (HPLC) separates the sample into its components and measures purity. It shows how much of the vial is the target peptide and how much is anything else. Mass spectrometry (MS) confirms identity by measuring the molecular weight of the compound and checking it against the expected value for that exact sequence.

Purity alone doesn't prove you have the right peptide, and identity alone doesn't prove it's clean. Running both means each batch is verified on both counts: the right molecule, at the stated purity.

03

Certificate of Analysis

Every batch comes with its own Certificate of Analysis (COA). It is the documented record of what testing found. Each COA shows the batch number, the HPLC chromatogram and measured purity, the mass spectrometry results confirming molecular identity, and the date of analysis.

Match the batch number on your vial to its COA, and you can see exactly what was verified for that batch, not a generic sample.