Biotin-PEG3-Maleimide is widely used in bioconjugation and biochemical research. It serves as a versatile linker for attaching biotin to proteins, peptides, or other biomolecules, enabling their detection or purification through streptavidin-biotin interactions. The maleimide group allows for specific conjugation to thiol groups (-SH) in cysteine residues, ensuring precise and stable labeling. This compound is particularly valuable in the development of targeted drug delivery systems, diagnostic assays, and molecular imaging techniques. Its PEG spacer enhances solubility and reduces steric hindrance, improving the efficiency of biotinylation processes. Researchers also utilize it in the study of protein-protein interactions, cell surface labeling, and the development of biotinylated probes for various analytical applications.