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Convertible liposomes that show phase separation of lipids on Liposomal surface [9]. (a) Liposomes with uniformly distributed PEGylated lipids on the liposome surface at physiological pH. (b) Phase separation of lipids, which leads to formation of domains with a high concentration of PEG lipids on the liposome surface that in turn leads to increased interactions with the negatively charged cell surface.
