FIGURE 1.

Typical liquid-expanded surface pressure-area and dipole potential-concentration isotherms showing the origin of measured and calculated descriptors. Shown are representative experimental points obtained with DhDhPE. Solid lines are obtained by fitting π-A and ΔV₋₁/A data as described in Materials and Methods over the range of data indicated by the range of the line. Descriptors depicted are the dehydrated lipid molecular area, (A_∞); the modulus of compression, (); the lipid area-independent component of the dipole potential, (ΔV₀); and the perpendicular component of the lipid dipole moment (μ_⊥ = [dΔV/d(1/A)]/37.7).