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Polylysine-induced (2)H NMR-observable domains in phosphatidylserine/phosphatidylcholine lipid bilayers
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Biophysical Journal
- Article date:
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December 1, 2001
- Author:
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;
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Copyright informationCopyright Biophysical Society Dec 2001. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT The interaction of three polylysines, Lys^sub 5^ (N = 5), Lys^sub 30^ (N = 30), and Lys^sub 100^ (N = 100), where N is the number of lysine residues per chain, with phosphatidylserine-containing lipid bilayer membranes was investigated using 2H NMR spectroscopy. Lys^sub 30^ and Lys^sub 100^ added to multilamellar vesicles composed of (70:30) (mol:mol) mixtures of choline-deuterated 1 -palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) + 1 -palmitoyl-2-oleoyl-sn-glycero-3-phosphoserine (POPS) produced two resolvable 2H NMR spectral components under conditions of low ionic strength and for cases where the global anionic lipid charge was in excess over the global cationic ...
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