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Fluorescein-PEG3-(N-Boc)-amine is a heterobiofunctional PEG linker containing a fluorescein dye and 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.

Fluorescein-PEG3-NH-Boc is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs[1].

PEGs

[1] An S, et al. Small-molecule PROTACs: An emerging and promising approach for the development of targeted therapy drugs. EBioMedicine. 2018 Oct;36:553-562 DOI:10.1016/j.ebiom.2018.09.005