FIGURE 8.

Experimental and simulated ³¹P-chemical shift spectra of POPC bilayers containing 10% MSI-78. (A) Parallel orientation, (B) perpendicular orientation. The best-fitting simulations combined lipids in toroidal pores (73%) and H_I phase (27%). The spectral parameters for the simulation of the toroidal pore component: σ_‖ = 26 ppm, σ_⊥ = −15 ppm, 2 ppm line broadening; for the H_I phase component, σ_‖ = −15 ppm, σ_⊥ = +5.3 ppm, and 1.5 ppm line broadening. The experiments were performed at 30°C.