Biotin-PEG6-Maleimide is widely used in bioconjugation and biochemical research. Its primary application is in labeling proteins, peptides, or other biomolecules for detection, purification, or targeting purposes. The maleimide group allows for specific conjugation to thiol groups (-SH) in cysteine residues, ensuring precise attachment. The PEG6 spacer provides flexibility and solubility, reducing steric hindrance and improving the functionality of the labeled molecule. The biotin moiety enables strong binding to streptavidin or avidin, facilitating applications such as immunoassays, affinity chromatography, and imaging studies. This compound is particularly useful in designing drug delivery systems, studying protein interactions, and developing diagnostic tools.