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SPDP-PEG-NHS-ester is a heterobifunctional cross-linking reagent that contains three different functional groups, namely succinimidyl (NHS) ester, pyridyldithio (PDP), and PEG.

The NHS ester group is known for its ability to react with primary amines, such as lysine residues in proteins or peptides, resulting in stable amide bonds. The PDP group, on the other hand, can react with free thiol groups, such as cysteine residues, to form disulfide bonds. The PEG chain provides hydrophilic and biocompatible properties, enhancing the stability and solubility of the resulting conjugates.

SPDP-PEG-NHS-ester has been extensively utilized in the development of various drug delivery systems, including antibody-drug conjugates, protein-polymer conjugates, and PEGylated peptides. Its unique chemical properties allow for the controlled conjugation of drugs or therapeutic agents to specific sites on a protein or peptide, leading to improved pharmacokinetic and pharmacodynamic profiles.


Cat# Name Structure M.W. Purity Pricing
AP10042SPDP acid NHS ester312.37≥98% Pricing
AP11950SPDP-C6-NHS ester425.52≥95% Pricing
AP11951SPDP-C6-Sulfo-NHS ester527.56≥95% Pricing
AP11433SPDP-PEG4-NHS ester559.65≥95% Pricing
AP11832SPDP-C6-Gly-Leu-NHS ester595.73≥95% Pricing
AP11434SPDP-PEG6-NHS ester647.76≥95% Pricing
AP11435SPDP-PEG8-NHS ester735.86≥95% Pricing
AP11436SPDP-PEG12-NHS ester912.07≥95% Pricing
AP13379SPDP-PEG-24-NHS ester1439.7≥95% Pricing
AP13380SPDP-PEG36-NHS ester1968.4≥92% Pricing

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