Surface tension (γ) as a function of time for 2D cell membrane lipid extracts (panel a) and 3D cell membrane lipid extracts (panel b). Lipid surface concentration is 150 Å2/lipid molecule. The subphase is 0.15 M NaCl, T = 22°C
Immediately after spreading of 2D extract, an equilibrium value of
surface tension (γ eq = 52.2 mN/m) was
reached (Fig. 1 a and Table 2 ).
For 3D membrane extracts, the equilibrium value of γ was reached
after about 120 s and it was much lower (γ eq
= 29.7 mN/m) (Fig. 1 b and Table 2 ).
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