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pH‐Sensitive liposomes were prepared by modifying the surfaces of egg phosphatidylcholine (EPC) liposomes and dioleoylphosphatidylethanolamine (DOPE) liposomes with an acidic proteinoid. The acidic proteinoid (Prot AL) was prepared by a melt‐condensation of aspartic acid and leucine (98.5:1.5 mol/mol). The maximum amount of Prot AL accommodated by EPC liposomes without loss of the fluorescence quenching...
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