m-PEG6-(CH2)8-phosphonic acid ethyl ester is a PEG Linker.

m-PEG4-(CH2)8-phosphonic acid ethyl ester is a PEG Linker.

m-PEG4-phosphonic acid ethyl ester is a PEG Linker.

m-PEG6-(CH2)8-phosphonic acid is a PEG Linker.

m-PEG4-(CH2)8-phosphonic acid is a PEG Linker.

Carboxy-PEG4-phosphonic acid ethyl ester is a PEG Linker.

Acid-PEG9-NHS ester is a PEG derivative containing a carboxylic acid and an NHS ester. The hydrophilic PEG spacer increases solubility in aqueous media. The terminal carboxylic acid can be reacted with primary amine groups in the presence of activators (e.g. EDC, or DCC) to form a stable amide bond. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.

Acid-PEG3-NHS ester is a PEG derivative containing a carboxylic acid and an NHS ester. The hydrophilic PEG spacer increases solubility in aqueous media. The terminal carboxylic acid can be reacted with primary amine groups in the presence of activators (e.g. EDC, or DCC) to form a stable amide bond. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.

3,4-Dibromo-Mal-PEG4-t-butyl ester is a PEG Linker.

Mal-amido-PEG8-TFP ester is a PEG Linker.

Azido-PEG4-(CH2)3-methyl ester is a crosslinker containing an azide group and a methyl ester. The azide group enables Click Chemistry. The hydrophilic PEG spacer increases solubility in aqueous media.

Azido-PEG1-methyl ester is a crosslinker containing an azide group and a methyl ester. The azide group enables Click Chemistry. The hydrophilic PEG spacer increases solubility in aqueous media.

Azido-PEG3-phosphonic acid is a PEG derivative containing an azide group and a phosphonic acid. The azide group enables Click Chemistry andthe phosphonic acid can be a potential ligand choice. The hydrophilic PEG spacer increases solubility in aqueous media.

Azido-PEG3-Maleimide is a PEG derivative containing an azide group and maleimide group. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The maleimide group will react with a thiol group to form a covalent bond, enabling the connection of biomolecule with a thiol.

Ald-PEG4-azide is a PEG Linker.

Acid-PEG3-PFP ester is a PEG Linker.

Acid-PEG4-mono-methyl ester is a PEG derivative.

Acid-PEG4-t-butyl ester is a PEG derivative containing a t-butyl protected carboxyl group with a terminal carboxylic acid. The terminal carboxylic acid can be reacted with primary amine groups in the presence of activators (e.g. EDC, or DCC) to form a stable amide bond. The hydrophilic PEG spacer increases solubility in aqueous media. The t-butyl protected carboxyl group can be deprotected under acidic conditions.

m-PEG4-(CH2)3-methyl ester is a PEG Linker.

m-PEG4-aldehyde is a PEG derivative containing an aldehyde group. Aldehyde is reactive to hydrazide and aminooxy groups which are commonly used in biomolecular probes for labeling and crosslinking carbonyls (oxidized carbohydrates). The hydrophilic PEG spacer increases solubility in aqueous media.

1-isothiocyanato-PEG4-Alcohol is a PEG Linker. PEG Linkers may be useful in the development of antibody drug conjugates.

Azido-PEG4-(CH2)3OH is a PEG derivative containing an azide group and a terminal hydroxyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. The hydroxyl group enables further derivatization or replacement with other reactive functional groups.

TAMRA-PEG4-acid is a TAMRA red-fluorescent dye derivative with excitation/emission maximum 553/575 nm, This molecule contains a carboxylic acid group which can be reacted with primary amine groups in the presence of activators (e.g. EDC, or DCC) to form a stable amide bond.

Sulfo DBCO-Maleimide a water-soluble sulfhydryl reactive containing a maleimide group and a DBCO moiety. Maleimide group specifically and efficiently reacts with thiols to form stable thioether bonds. The low mass weight will add minimal spacer to modified molecules and will enable simple and efficient incorporation of DBCO moiety onto cysteine-containing peptides or other thiol-containing biomolecules.

TAMRA-PEG4-DBCO is a PEG derivative containing a TARMA dye and a DBCO group, which enables Click Chemistry. The TAMRA dye has achieved prominence as a dye for oligonucleotide labeling and automated DNA sequencing applications. DBCO will react with azide functionalized compounds or biomolecules without catalyst to form a stable triazole linkage, which is an ideal alternative to copper intolerant applications. The hydrophilic PEG spacer increases solubility in aqueous media.

Sulfo DBCO-amine is a water-soluble building block containing DBCO moiety. This reagent can be used to derivatize carboxyl-containing molecules or activated esters (e.g. The NHS ester) with DBCO moiety through a stable amide bond. The low mass weight will add minimal spacer to modified molecules and the hydrophilic sulfonated spacer arm will greatly improve water solubility of DBCO derivatized molecules.

Propargyl-PEG1-SS-PEG1-propargyl is a cleavable PEG Linker. PEG Linkers may be useful in the development of antibody drug conjugates.

Bromo-PEG4-azide is a PEG derivative containing a bromide group and a terminal azide. The hydrophilic PEG spacer increases solubility in aqueous media. The bromide (Br) is a very good leaving group for nucleophilic substitution reactions. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage.

t-Boc-N-amido-PEG3-thiol is a PEG derivative containing a Boc-protected amino group and a thiol group. The Boc group can be deprotected under mild acidic conditions to form the free amine. The thiol group reacts with maleimide, OPSS, vinylsulfone and transition metal surfaces including gold, silver, etc.

m-PEG3-ONHBoc is a PEG derivative. PEG Linkers and derivatives may be useful in the development of antibody drug conjugates.