A liposome kit composed of ...phosphatidycholine/stearylamine/cholesterol was purchased from Sigma-Aldrich, as was stearylamin.Stearonitrile was purchased from Santa Cruz Biotechnology, Inc, The solvents chloroform and ethanol were of spectroscopic grade from Sigma-Aldrich. Stock solutions of stearyl amine,lipid mixtures and stearyl nitrile were prerpared in chloroform