PEG

Bromo-PEG-bromide, MW 10,000 is a polyPEG linker containing two bromide groups. The bromide (Br) is a very good leaving group for nucleophilic substitution reactions. The hydrophilic PEG spacer increases solubility in aqueous media.

Acid-PEG25-t-butyl ester is a PEG linker containing a t-butyl group with a terminal carboxylic acid. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. HATU) to form a stable amide bond. The hydrophilic PEG spacer increases solubility in aqueous media. The t-butyl group can be deprotected under acidic conditions.

Methylaniline-PEG-alcohol, MW 5,000 is a large bifunctional PEG linker that contains a primary alcohol as well as a methylaniline group. The alcohol functional group is a highly versatile building block for adding molecular complexity, as it can be substituted with or ligated to a wide variety of chemical moieties such as carboxylic acids. The methylaniline is a highly electron-dense heterocycle with a wide variety of chemical uses in exploring the chemical space of a given API.

DBCO-amine TFA salt is a simple building block containing a DBCO moiety and an amine group. Amine is very reactive with NHS ester. DBCO is commonly used for copper-free Click Chemistry reactions.

DBCO-PEG8-amine TFA salt is a PEG linker which contains DBCO and amine moieties. The DBCO group is commonly used in copper-free Click Chemistry reactions. The amine group is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc. The hydrophilic PEG spacer increases the water solubility of the compound. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

DBCO-PEG24-Maleimide is a PEG linker containing a DBCO moiety and a terminal primary maleimide group. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol. DBCO is commonly used for copper-free Click Chemistry reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

DBCO-PEG6-NHS ester is a click chemistry PEG reagent containing NHS ester that is able to react specifically and efficiently with primary amines (e.g. the side chain of lysine residues or aminosilane-coated surfaces) at neutral or slightly basic condition to form a covalent bond. The hydrophilic PEG spacer arm improves water solubility and provides a long and flexible connection that minimizes steric hindrance involved with ligation. DBCO is commonly used for copper-free Click Chemistry reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Biotin-PEG5-alcohol is a biotinylation reagent containing a primary hydroxyl that can be derivatized. The PEG spacer provides greater solubility to labeled molecules compared to reagents having only hydrocarbon spacers.