Insulin & early peptide isolation
Banting, F.G. & Best, C.H. (1922). The internal secretion of the pancreas. Journal of Laboratory and Clinical Medicine.
PMC2140050 — NCBI● Research only
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Peptides for Research
What are peptides?
Peptides are short chains of amino acids — the same building blocks that make up every protein in your body. Think of amino acids like LEGO bricks. A peptide is a small, specific sequence of those bricks snapped together in an exact order. Change one brick, and you get something completely different.
That order — called the sequence — is everything. When you order from a research catalog, what you’re really buying is that exact sequence, backed by lab documentation proving what’s in the vial. Not a nickname. Not a general category. A precisely manufactured molecule with a paper trail.
A useful way to think about any peptide order: defined molecule + lot documentation + a clear assay question. If you can’t state what you’re testing for, pause before you buy.
History — how peptides went from a mystery to a research tool
It started with a simple question: what’s actually doing the work inside living tissue?
In the early 1900s, scientists were dissecting biological fluids and extracts, separating them into fractions, and testing each one to see which fraction still carried the effect they were studying. It was slow, painstaking work. But it paid off. Research into pancreatic extracts eventually led to the isolation of insulin — proof that a single, defined peptide hormone could be pulled from biological material, identified, and used to save lives. Animals were the test subjects first. Rats, dogs, rabbits — studied under controlled lab conditions long before any human application was considered.
That discovery changed how scientists thought about biology. If one hormone could be isolated and characterized, others could too. The hunt was on.
For decades though, there was a major bottleneck: you could find peptides in nature, but you couldn’t easily make them. Extracting enough of any compound from biological tissue was expensive, inconsistent, and limited by what nature provided.
That changed in the 1960s when chemist Bruce Merrifield invented solid-phase peptide synthesis — a method for building peptide chains one amino acid at a time, in a controlled sequence, in a lab. He eventually won the Nobel Prize for it. Suddenly scientists could design and build any sequence they wanted, test it on lab animals, tweak a single amino acid, and test again. This is how researchers began mapping which sequences produced which effects — not by guessing, but by systematically building, testing, and comparing.
Where research peptides come from today is a direct result of that work. Your vial isn’t extracted from an animal. It’s a manufactured article — synthesized to an exact sequence, released under a batch record, and verified by analytical testing before it ships. Nature still inspires the targets. The lab builds them.
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References
References
Bruce Merrifield & solid-phase peptide synthesis
Merrifield, R.B. (1963). Solid phase peptide synthesis. Journal of the American Chemical Society.
ACS Publications — DOINobel Prize — Merrifield (1984)
Official Nobel Prize background for the chemistry award.
NobelPrize.org — factsWhat peptides are — general science background
National Human Genome Research Institute — amino acids glossary
Genome.gov — amino acidsNIH National Library of Medicine — peptides overview
PubChem — PeptidePeptide synthesis & modern research use
Sigma-Aldrich / Merck — introduction to peptide synthesis
Sigma-Aldrich — technical articleAnimal research & testing standards
NIH Office of Laboratory Animal Welfare
OLAW.nih.gov — tutorial02 Ready to save? Join the membership →
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Understanding the catalog
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Our pricing
How pricing works
Every peptide in the catalog sits in one of three tiers based on the compound and presentation:
Tier 1 — $69 SKUs
Standard research peptides indexed at the $69 price point. These are your most accessible entry points into the catalog.
Tier 2 — $99 SKUs
Higher-grade or different presentations indexed at $99. Same ordering process, different compound or format.
Tier 3 — Combo Deals
Bundled SKUs with their own published bundle pricing. Each combo has a component list — reconcile those lots against your protocol before ordering.
Volume discounts
Discounts are based on how many vials of the same peptide you add to your cart. There is no mixing and matching — quantity bands apply per SKU, not across different peptides combined.
- 1–4 vials — Standard pricing for that tier. Any active sitewide or promotional discounts still apply.
- 5+ vials — Typically 25% off that SKU’s tier price. The discount kicks in automatically when your cart hits the threshold for that specific peptide.
- 10+ vials — Deeper discount, 25% or more off depending on the SKU. This is the strongest per-vial economics available.
Research use only. Materials discussed or linked here are for qualified laboratory research unless lawfully authorized for another purpose where you operate. They are not for human or veterinary diagnosis, treatment, cure, or prevention of disease, or for food, drug, or cosmetic use except as permitted by law. You are responsible for compliant purchase, storage, handling, and use consistent with labeling, site terms, and applicable regulations.
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