Used in bioconjugation processes, it facilitates the attachment of polyethylene glycol (PEG) chains to proteins, peptides, or other biomolecules. This modification enhances solubility, stability, and reduces immunogenicity of the conjugated molecules. Commonly applied in drug delivery systems to improve the pharmacokinetics and bioavailability of therapeutic agents. It is also utilized in the development of diagnostic tools and biosensors, where PEGylation helps in reducing non-specific binding and improving detection sensitivity. Additionally, it plays a role in surface modification of materials to create biocompatible coatings for medical devices.