Fluorescein-PEG8-(N-Boc)-Amine functions as a heterobifunctional PEG linker containing a Boc-protected amine group, which can be regenerated by mild acidic conditions and then be reactive with cabroxylic acid, activated NHS ester, carbonyl (ketone, aldehyde) etc. Fluorescein is a common fluorescent tracer (494nm/521nm) for staining cells, tissues, biomarkers or nanoparticles and this reagent can be used to tag biomolecules and nanoparticles. The PEG8 chain enhances the compound's water solubility.
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