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. 2012 May 15;109(25):E1609-E1618. doi: 10.1073/pnas.1119442109

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Fig. P1. — (A) 2D Electron density representations (DOPC/DOPE 1∶1) of two lipid bilayers (left) and of a slice through a stalk (right). Regardless of the molar fraction of the nonbilayer lipids DOPE or cholesterol, stalk phase formation occurred at a critical interbilayer distance . The dashed black lines indicate contours of constant electron density contrast Δρ = 0.3. (B) Corresponding 3D electron density isosurface and the local distribution of mean curvature H. (C) Energy landscape of the bending energy (κ/2)∫(2H - c₀)²dA (left). Published values of the elastic coefficients lead to about 15 k_BT. Pressure-distance curves P(d_w) in the lamellar phase (right) allow determination of the energy required for dehydration to .

Inline graphic — (A) 2D Electron density representations (DOPC/DOPE 1∶1) of two lipid bilayers (left) and of a slice through a stalk (right). Regardless of the molar fraction of the nonbilayer lipids DOPE or cholesterol, stalk phase formation occurred at a critical interbilayer distance . The dashed black lines indicate contours of constant electron density contrast Δρ = 0.3. (B) Corresponding 3D electron density isosurface and the local distribution of mean curvature H. (C) Energy landscape of the bending energy (κ/2)∫(2H - c₀)²dA (left). Published values of the elastic coefficients lead to about 15 k_BT. Pressure-distance curves P(d_w) in the lamellar phase (right) allow determination of the energy required for dehydration to .