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- W1979104037 abstract "The processes of liposome solubilization and reconstitution were studied by using n-dodecyl octaethylene glycol monoether (C12E8). The solubilization of large unilamellar liposomes prepared by reverse-phase evaporation was systematically investigated by turbidity, 31P nuclear magnetic resonance, and centrifugation experiments. The solubilization process is well described by the three-stage model previously proposed for other detergents, and our results further demonstrate the validity of some of the postulates related to this model. In stage I, the detergent distributes between the bilayers and the aqueous solution with a partition coefficient of 1.6 mM-1. In stage II, the detergent-saturated liposomes convert into mixed micelles, the conversion being complete by stage III where all the phospholipids are present as mixed micelles. The agreement between the three methods was excellent, and the results allowed quantitative determination of the effective detergent to phospholipid ratios at which the lamellar to micellar transformation begins and is complete, which amounted to 0.66 and 2.2 (mol/mol), respectively. Furthermore, compositional analysis determined from centrifugation experiments directly demonstrate that the properties of detergent-saturated liposomes and mixed micelles remain constant throughout most of stage II: the C12E8 to phospholipid ratios in the pelleted vesicles and in micelles are constant during stage II and similar to the ratios at which stage II was initiated and complete, respectively. On the other hand, bilayer formation upon detergent removal from mixed C12E8-phospholipid micelles by SM2 Bio-Beads is demonstrated to be the symmetrical opposite of bilayer solubilization.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W1979104037 date "1990-10-01" @default.
- W1979104037 modified "2023-09-25" @default.
- W1979104037 title "Phospholipid vesicle solubilization and reconstitution by detergents. Symmetrical analysis of the two processes using octaethylene glycol mono-N-dodecyl ether" @default.
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- W1979104037 doi "https://doi.org/10.1021/bi00492a022" @default.
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