Used in bioconjugation processes to link biomolecules such as peptides, proteins, or antibodies with targeting ligands or detection tags. Its lipoamide group enables strong binding to gold surfaces and supports use in biosensors and diagnostic devices. The long PEG12 spacer reduces steric hindrance, improves solubility, and enhances the accessibility of the attached molecule in biological systems. Commonly applied in the development of immunoassays, targeted drug delivery systems, and surface functionalization of nanoparticles and biosensor chips.