FmocNH-PEG5-CH2CO2-NHS ester is a heterobifunctional PEG linker with an Fmoc-protected amine and an NHS ester specifically for orthogonal conjugation. The PEG5 spacer improves solubility and flexibility for especially efficient, stepwise bioconjugation.
Polyethylene Glycol PEG Linkers > Fmoc PEG > Fmoc-PEG-CH2CO2-NHS
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