Research peptides,
verified to the residue.
SEQUENCE supplies HPLC- and mass-spec–verified peptides to laboratories, CROs, and qualified independent researchers across the US. Every vial ships with a batch-specific Certificate of Analysis — no exceptions.
Sequence Verification
Identity and purity confirmed via analytical HPLC and mass spectrometry on every production lot.
Cold-Chain Packaging
Insulated, trackable shipping from our lab to your loading dock, dispatched within 48 hours.
Batch-Specific COA
Every order ships with a lot-numbered Certificate of Analysis — kept on file for as long as you need it.
Precision synthesis, built for the bench.
SEQUENCE exists because "research-grade" shouldn't be a marketing label. Every peptide we list is synthesized via solid-phase methods, cleaved and purified to spec, then verified independently before it ever reaches a vial. We work with university labs, contract research organizations, and qualified independent researchers who need to trust what's actually in the tube.
Solid-Phase Synthesis
Each sequence is built residue-by-residue on resin, then cleaved and purified under controlled conditions.
HPLC + Mass-Spec QC
Every batch is independently verified for purity and identity — not spot-checked, every single lot.
Cold-Chain Custody
Vials are packed with cold-chain materials and tracked from our lab to your loading dock.
For Laboratory & Research Use Only
- All products are sold strictly for in-vitro laboratory research. They are not drugs, dietary supplements, or cosmetics, and are not approved for human or veterinary use.
- By placing an order you confirm you are a qualified researcher or institution purchasing for lawful research purposes, and that you are 21 years of age or older.
- SEQUENCE does not provide instructions for human administration. Handling and storage information is provided for laboratory use only.
Shop research peptides.
Lyophilized powder, sealed under controlled atmosphere. Every listing ships with a lot-specific Certificate of Analysis.
*Reference sequence shown for catalog purposes — refer to the lot-specific Certificate of Analysis for verified composition. Research use only; not for human or veterinary use.
From sequence to vial, in five controlled steps.
Solid-Phase Synthesis
The target sequence is assembled residue-by-residue on a solid resin support.
Cleavage & Purification
Crude peptide is cleaved from resin, then purified via preparative HPLC.
Identity Verification
Purity and identity are confirmed independently via analytical HPLC and mass spectrometry.
Lyophilization & Vialing
Verified peptide is freeze-dried and sealed into vials under controlled atmosphere.
Cold-Chain Dispatch
Each order is packed with cold-chain materials and shipped with its batch COA.
Every lot, independently verified — not just the first one.
We don't verify a "reference batch" and call it done. Each production lot is sent to an independent analytical lab for HPLC purity and mass-spec identity confirmation before it's released for sale. The resulting Certificate of Analysis ships with your order and stays on file under that lot number for as long as you need it.
What research teams say about working with us.
"The COA matches the analytical data on every batch we've ordered. That consistency is what keeps our intake QC simple."
"Cold-chain packaging has held up reliably even on multi-day transit. No degradation flags from our receiving protocol."
"Their documentation makes our audit trail straightforward — every vial traces back to a lot number and a dated COA."
FAQs
Have a question for our lab team?
Reach out about bulk ordering, custom synthesis requests, or a specific Certificate of Analysis — a chemist on our team replies within one business day.