Used as a protein conjugate to enhance drug delivery, improving solubility and stability while reducing immunogenicity. Commonly applied in therapeutic formulations to extend circulation time in the bloodstream. Acts as a biocompatible polymer in biomedical applications such as drug carriers and diagnostic agents. Suitable for use in targeted therapies due to its tunable properties and resistance to protein adsorption. Also employed in surface coatings to prevent biofouling in medical devices.