DSPE-PEG-Fluor 647, MW 5,000 is a bright green-fluorescent dye consisting of a PEG 5k spacer between the hydrophilic phosphate head and hydrophobic lipid tails. The dye is water soluble and pH-insensitive from pH 4 to pH 10. It has 4 sulfonate groups, making it more hydrophilic and less aggregating in aqueous solutions. The polymer can self-assemble to form lipid bilayer in water.
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