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We've been handling this one for a while now, and most buyers go with the 10mg or 15mg vial sizes for their metabolic pathway studies, but it really depends on how many assays you're running—the 5mg option is easier to reconstitute if you're just testing a few plates. CAS 2023788-19-2, molecular weight 4813 g/mol, and we typically stock the freeze-dried powder at ≥99% purity by HPLC, which is better than reagent grade for this kind of dual-receptor work.
The C20 fatty diacid side chain at Lys20 is what gives it that extended half-life in the dish, and you'll want to store it at 2-8°C protected from light, otherwise it'll degrade faster than you'd like. We've had a few labs complain about clumping after a month or so at room temp, so just a heads-up—it's pretty sensitive to heat and moisture.
Actually, we don't recommend this for acute toxicity screens because the peptide backbone (39 amino acids with Aib substitutions at positions 2 and 13) can cause some nonspecific binding in certain cell lines, but for GLP-1/GIP receptor binding assays it's pretty much ideal. Our standdard packaing is 10, but our company can do custom quantities if you need 50 vials or so—just check lead time, as custom runs usually take 20 days or so.
One thing buyers don't always think to ask is that the white powder can be a bit hygroscopic once the vial is opened, so work quickly when reconstituting in sterile water or buffer, and don't leave it out on bench for more than a few minutes. We include a COA with every batch, and the HPLC trace shows a single major peak at roughly 4.8 minutes under our standard gradient, which is tighter tolerance than most generic supliers offer.
Anyway, for ordering we've got the 5mg, 10mg, and 15mg vials in stock usually, but the 15mg tends to run out first because of that it's what most researchers go for in dose-response studies. You'll need to specify the grade when you order—pharmaceutical grade is what we list, but we also have a research grade that's about 97% purity if budget is a concern, though I'd stick with teh 99% for anything involving receptor kinetics.
Standard MOQ is 10 vials per box, but we can work with you on custom quantities if you need more or less—just reach out.
Yes, we supply a COA with every batch, confirming the ≥99% HPLC purity and other specs like appearance and molecular weight.
Usually 3-5 business days for stock orders. Custom packaging might add a couple more days, but we'll confirm exact timing when you order.
Absolutely. The standard is 10 vials per box, but we offer custom packaging options—just tell us your preferred vial count or size.
Keep it at 2-8°C, protected from light. It's a freeze-dried powder, so proper storage keeps it stable for research use.
