The method of radiationless energy transfer was used to study the structure of lysozyme complexes with liposomes composed of phosphatidylcholine and diphosphatidylglycerol (4:3, mol:mol). 4-(n-Dimethylaminostyryl)-1-methylpyridinium n-toluenesulfonate, 4-(n-dimethylaminostyryl)-1-hexylpyridinium n-toluenesulfonate, 4-(n-dimethylaminostyryl)-1-dodecylpyridinium n-toluenesulfonate, and 3-metoxybenzanthrone were used as donors, and nile blue and rhodamine 6G, as acceptors. An increase in the surface area of model membranes upon binging of the protein to lipid bilayer was found.
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