Anisotropy decay parameters in unilamellar vesicles.

Effect of modification of membrane cholesterol content. The phase and modulation data are analyzed with a hindered rotation decay modela.ar0 refers to the time 0 anisotropy. r∞ is the residual anisotropy at infinite time. f1 is the fraction of the observed anisotropy decay associated with the fast depolarization process. Θ1 is the fast rotational correlation time. R1 refers to the fast rotational rate. S is the order parameter. The reduced chi-squared (χ2) value ranges from 0.3 up to maximum values of 8.0. The r0 and r∞ errors were all f1 and S errors were all χ2.