linear heterobiofunctional PEG reagent with a fluorescein dye and an
amine group that is reactive with cabroxylic acid, activated NHS ester,
carbonyl (ketone, aldehyde) etc. Fluorescein
often called FITC is a commonly used fluorescent tracer in biology for
staining cells, tissues, biomarkers or nanoparticles. It has peak
absorption or excitation at 494 nm and maximum emission at 521 nm.
Fluorescent PEG is commonly used for PEGylation to label or tag
biomolecules and nanoparticles with dye and tracer.
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