DSPE-PEG-Fluor 488, MW 5,000 is a PEG-dye-lipid conjugate consisting of a DSPE phospholipid and a Fluor 488 dye. DSPE is a phospholipid that is well-known to spontaneously form micelles in aqueous media, while Fluor 488 is a cyanine dye that is prominently used in fluorescence microscopy. Fluor 488 has excitation and emission maxima at 499 nm and 520 nm. PEG-lipids are commonly used in lipid nanoparticles for their stabilizing effect.
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