| http://www.w3.org/ns/prov#value | - and M is an alkali metal, such as sodium. [0034] The cationic amphiphilic lipids can more particularly be selected from the group of quaternary ammonium salts, fatty amines and their salts. [0035] The quaternary ammonium salts include, for example: [0036] those which exhibit the following formula (II): [0037] wherein the R1 to R4 radicals, which can be identical or different, represent a linear or
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