1,2-Distearoyl-sn-Glycero-3-Phosphoethanolamine (DSPE) and NBD (nitrobenzofurazan) conjugated Polyethylene Glycol, DSPE PEG NBD is a fluorescent phospholipid PEG conjugate that can be used as lipid membrane probe. NBD has excitation/emission wavelength at 460 nm/534 nm.