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Vector Laboratories is closed for the President’s Day on Monday, February 19th. We will be back in the office on Tuesday, February 20th.
We will respond to emails upon our return. Have a wonderful day.
m-dPEG®25-acid, product number QBD-11289, is a long (77 atoms, 89.9 Å), methyl-capped, discrete chain length polyethylene glycol (dPEG®) spacer that terminates in a propionic acid group. The terminal propionic acid moiety can be coupled directly to free amines using EDC or another carbodiimide. Alternatively, the reactive end can be converted into an active ester that can then be conjugated to free amines. N-hydroxysuccinimide (NHS), 2,3,5,6-tetrafluorophenol (TFP), and 2,3,4,5,6-pentafluorophenol (PFP) typically are used for this purpose.
m-dPEG®25-acid can modify amine-functionalized surfaces (carbon nanotubes, other nanoparticles, quantum dots, etc.) or free amines on biomolecules. When used to coat surfaces or modify biomolecules, m-dPEG®25-acid reduces or eliminates non-specific binding, increases the hydrodynamic volume and water solubility of the conjugate molecule. Please note that modifying the surface amines of biomolecules with this uncharged, methyl-capped dPEG® spacer may alter the overall charge of the resulting conjugates.
| Unit Size | 100 mg, 1000 mg |
|---|---|
| Molecular Weight | 1161.37; single compound; |
| Chemical formula | C₅₂H₁₀₄O₂₇ |
| CAS | N/A |
| Purity | > 98% |
| Spacers | dPEG® Spacer is 77 atoms and 89.9 Å |
| Shipping | Ambient |
| Typical solubility properties (for additional information contact Customer Support) | Methylene chloride, Acetonitrile, DMAC, DMSO or water. |
| Storage and handling | -20°C; Always let come to room temperature before opening; be careful to limit exposure to moisture and restore under an inert atmosphere; stock solutions can be prepared with dry solvent and kept for several days (freeze when not in use). dPEG® pegylation compounds are generally hygroscopic and should be treated as such. This will be less noticeable with liquids, but the solids will become tacky and difficult to manipulate, if care is not taken to minimize air exposure. |
Greg T. Hermanson, Bioconjugate Techniques, 2nd Edition, Elsevier Inc., Burlington, MA 01803, April, 2008 (ISBN-13: 978-0-12-370501-3; ISBN-10: 0-12-370501-0). Specifically see pp. 726-729 in his Chapter 18 on discrete PEG compounds for pegylation applications.
Greg T. Hermanson, Bioconjugate Techniques, 3rd Edition, Elsevier, Waltham, MA 02451, 2013, ISBN 978-0-12-382239-0; See chapter 18, Discrete PEG Reagents, pp.787-821, for a full overview of the dPEG® products.
Applicable patents and legal notices are available at legal notices.
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