PEG

Propargyl-PEG5-Tos is a PEG linker containing a tosyl group and a propargyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The tosyl group is a very good leaving group for nucleophilic substitution reactions. The propargyl group can react with azide-bearing compounds or biomolecules via copper catalyzed azide-alkyne Click Chemistry to yield a stable triazole linkage. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Propargyl-PEG4-bromide is a crosslinker that can be used in copper catalyzed azide-alkyne Click Chemistry to form a stable triazole linkage with azides. The bromide (Br) acts as a good leaving group for nucleophilic substitution reactions. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Hydroxy-PEG2-CH2CO2H sodium salt is a PEG linker containing a hydroxyl group with a terminal carboxylic acid (as sodium salt form). The free acid form is not stable due to the reaction of OH with PEG-COOH group to form polymer. The sodium salt form is stable for storage and shipping. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. The hydrophilic PEG spacer increases solubility in aqueous media. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Acid-PEG4-SS-PEG4-acid is a homobifunctional cleavable linker with carboxylic acid groups at both sides. The terminal carboxylic acids can be reacted with primary amines in the presences of activators such as EDC and HATU to form stable amide bonds. The disulfide bonds can be cleaved by using Dithiothreitol (DTT) reagent. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Acid-PEG2-SS-PEG2-acid is a homobifunctional, cleavable PEG linker with carboxylic acid groups at both terminus. Carboxylic acids can be reacted with primary amines in the presences of activators such as EDC and HATU to form stable amide bonds. The disulfide bonds can be cleaved by Dithiothreitol (DTT) reagent. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Acid-PEG3-SS-PEG3-acid is a is a homobifunctional, cleavable PEG linker. Carboxylic acids can react with primary amines in the presences of activators such as EDC and HATU. The disulfide bonds can be cleaved by Dithiothreitol (DTT) reagent. PEG spacer increase the compound's solubility. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Acid-PEG6-SS-PEG6-acid is a homobifunctional cleavable linker. The terminal carboxylic acids can react with primary amines in the presences of activators such as EDC and HATU to form stable amide bonds. The disulfide bonds can be cleaved by using Dithiothreitol (DTT) reagent. PEG6 spacer increase the compound;s solubility. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Fmoc-N-methyl-N-amido-PEG2-acid is a PEG linker containing an Fmoc-protected amine and a terminal carboxylic acid. The hydrophilic PEG spacer increases solubility in aqueous media. The Fmoc group can be deprotected under basic condition to obtain the free amine which can be used for further conjugations. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

1,1,1-Trifluoroethyl-PEG5-alcohol is a PEG linker containing a trifluoroethyl and alcohol group. The trifluoroethyl group is used to react with lysine and other primary amine groups in proteins, antibody and other molecules and surfaces. The alcohol group can react to further derivatize the compound. The hydrophilic PEG linkers increase the water solubility of the compound in aqueous media. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.