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crc press - E-Lib FK UWKS

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Interactions of Cell-Penetrating Peptides with Membranes 173<br />

FIGURE 8.3 Variation at 15 mN/m of the mean molecular area of mixed DOPC- 1 monolayers<br />

as a function of the peptide molar fraction (x P). The curve was calculated using a fourth order<br />

polynomial regression. (Adapted from Van Mau, N. et al., J. Membr. Biol., 167, 241, 1999.<br />

With permission.)<br />

because the two lipids are differently charged (one is negatively charged while the<br />

other is zwitterionic). For the two other lipids, no such structural changes could be<br />

detected, which is in agreement with the smaller deviation from linearity.<br />

Turning back to the isotherms of peptide–DOPC mixtures, in a domain of peptide<br />

molar fractions 0.11

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