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We've seen a lot of labs struggle with inconsistent gallbladder and pancreatic response data from crude extracts or raw cholecystokinin, which basically introduces too many variables for reliabel replications, and that's where having a defined synthetic peptide becomes the difference between publishable results and throwing out half a batch.
The way we handle it here is by providing the exact C-terminal octapeptide sequence that matches endogenous cholecystokinin—Asp-Tyr(SO3H)-Met-Gly-Trp-Met-Asp-Phe-NH2—so you're getting the active binding region that triggers smooth muscle contraction without the molecular noise form partial digestion or batch-to-batch purification errors.
It's a at ≥99% purity, MW 1143.27, which is tight enough that most buyers don't bother with further purification for their functional assays, though solubility is only slight in water so you'll need to plan your reconstitution vehicle if you're running in vivo work, and after you reconstitute store it at 2-8°C (it doesn't hold at room temp long-term).
Another thing that usually catches people off guard is that this peptide integrates sulfation on the tyrosine, which is critical for CCK-1 receptor binding—without that post-translational mimic teh EC50 shifts by an order of magnitude or so, and we've had a few researchers who assumed a generic CCK analog would suffice, then had to redo half their.
We typically have 5mg and 10mg vials in stock for immediate shipment, and the MOQ is actually just one vial if you need to evaluate the lot, but for larger research series we'll send TDS, COA with HPLC traces, and SDS with shipment; payment is standdard net 30 for approved accounts or wire transfer for first-time orders, and customs documentation is provided as research-use only.
Lead time is usually 3-5 business days from order confirmation, though if you're on the West Coast and ordering Thursday afternoon you might want to account for Monday processing, or our company can hold the shipment if you need a specific delivery window—I've seen labs scramble when the dry ice shipment arrives Friday afternoon without authorization to recieve.
It means the peptide is at least 99% pure, with less than 1% impurities. We verify this using HPLC analysis, and we can provide the chromatogram upon request.
Our MOQ is typically 100 mg for this product, but we can accommodate smaller orders for research purposes — just reach out to us directly.
Yes, we include a CoA with each batch that details the purity, molecular weight, and other specs like appearance and solubility. It’s standard with every order.
Reconstitute in a suitable buffer, and store at 2-8°C. The powder is stable when stored properly, but once reconstituted, keep it refrigerated and use it within a short period to maintain integrity.
Absolutely, we can customize packaging sizes based on your research needs — just let us know the quantity you require, and we’ll adjust the vial size accordingly.
Outstanding experience with this purchase! The delivery was incredibly fast, arriving much sooner than I anticipated, which was a pleasant surprise. The packaging was secure and professional, ensuring the product was well-protected during transit. Regarding quality, the item appears to be of high standard based on initial inspection, with no visible defects or issues. Customer service was exceptional; they were responsive and helpful, promptly addressing my inquiries with clear and friendly communication. Overall, I'm very satisfied and would highly recommend this seller for their efficiency and reliability.
