Used in bioconjugation to link biomolecules such as proteins, peptides, or antibodies to surfaces or other molecules. The amine group (NH2) reacts easily with activated carboxylic acids (e.g., NHS esters), while the hydroxyl end (OH) provides stability or further modification options. Commonly applied in drug delivery systems to improve solubility and circulation time of therapeutic agents. Employed in tissue engineering and hydrogel formation due to its biocompatibility and ability to form crosslinked networks. Also used in surface modification of nanoparticles and medical devices to reduce nonspecific binding and enhance biocompatibility.