Used in drug delivery systems to improve the solubility and stability of therapeutic agents. Helps in prolonging the circulation time of drugs in the body by reducing immune recognition. Commonly employed in the synthesis of conjugates where controlled release is required. Applied in bioconjugation for attaching functional molecules like peptides, proteins, or nanoparticles. Facilitates the development of targeted therapies by enabling attachment to targeting ligands. Widely used in research and development of biopharmaceuticals and nanomedicine.