How a peptide is made today
How a peptide is made today: 5 articles from Peptidesfact. Long-form reporting on peptide science.
Inside a Solid-Phase Synthesiser
The invention of the method is a famous story. The working day is not. One shift at a modern synthesiser, from a weighed-out resin to the grey pellet at the bottom of a centrifuge tube, and the arithmetic that decides how much of it is worth keeping.
The Cell That Makes the Peptide Instead
Not every peptide comes off a bead. The longer ones are often grown in steel tanks by bacteria or yeast that have been handed a gene, and pulled out of the soup afterwards. The two routes can make the same molecule — and leave very different fingerprints behind.
The Freeze-Dryer and the Cake
The white puck at the bottom of a vial is the fossil of a three-day process: a solution frozen on a steel shelf, its ice pulled off as vapour under vacuum, its last traces of water coaxed out by gentle heat. Every feature of the cake records something about how that went.
The Law That Tried to Move the Factories Back
For thirty years peptide manufacturing drifted east because the arithmetic said so. In December 2025 the United States passed a law that pushes, carefully and narrowly, in the other direction. What it restricts is smaller than the headlines, and what it set in motion is larger.
The Purification Nobody Sees
A synthesiser makes a crowd of near-identical chains. A steel column the width of a drainpipe, a rack of collection tubes and a chemist with a spreadsheet decide which of them becomes the product — and how much of the batch is thrown away to get there.