FITC-PEG-SH

Synonyms: Fluorescein-PEG-SH

FITC-PEG-SH is a linear heterobiofunctional PEG reagent with a fluorescein dye and a sulfhydryl group at each end of the molecular chain. FITC, often referred to as fluorescein, is a biologically common fluorescent tracer used to stain cells, tissues, biomarkers, or nanoparticles. It has peak absorption or excitation at 494 nm and maximum emission at 521 nm. The FITC group can be easily traced from its yellow colour and green fluorescence. The sulfhydryl groups at the molecular chain end selectively react with maleimides and transition metal surfaces (Including Gold, Silver, etc.). The presence of sulfhydryl groups on the molecular chain allows FITC-PEG-SH to bind easily to other molecules or material surfaces.