18:1 PEG PE is a polyethylene glycol (PEG)-conjugated phospholipid, which can be used as a component of liposome stock solution, suitable for fluorescent PEG-grafted liposomes/fluorescent stealth liposomes or liposomes. For deposition of lipid bilayers on flow cell surfaces. Combination with lipid-modified dendrimer copolymers supports co-delivery of siRNA and tumor drugs.