Amino-PEG4-beta-D-galactose is a sugar PEG linker combining a reactive amino group for conjugation, a β-D-galactose moiety for cell targeting, and a PEG4 spacer for enhanced solubility, flexibility, and biocompatibility. This molecule enables efficient attachment of galactose to proteins, peptides, surfaces, or probes, supporting applications in bioconjugation, targeted drug delivery, diagnostics, imaging, and PROTAC synthesis. The modular design facilitates receptor-mediated targeting while maintaining aqueous solubility and stability, making it ideal for next-generation therapeutics and biomolecular engineering.
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