Figure 7.

Frequency dependence of relaxation rates and order parameters for simulated bilayers. Shown are plots of the simulated ²H NMR relaxation rates of the acyl carbons of DMPC versus the squared order parameters at different Larmor frequencies (${\nu }_0$). Data are included for carbons on the sn-2 chain of DMPC in the cholesterol-free bilayer in the fluid state. Simulated results are depicted as squares, and lines indicate the corresponding best fits. Note that the slope of the square-law increases with decreasing frequency, consistent with experimental NMR data. The simulation was performed at 44°C. To see this figure in color, go online.