FIGURE 7.

For CHO cells, plots of best fit values of the order parameter, S₀, and the rotational diffusion coefficient, R_⊥, of the two components (cross, L_o component; triangle, L_d component) of ESR spectra from different spin labels versus temperature. The thermally averaged fractions of the L_d spectral component P(L_d) are 0.25 ± 0.10 (7PC), 0.38 ± 0.02 (10PC), and 0.41 ± 0.11 (12PC). Because of the low signal/noise ratio of the spectra from 5PC in CHO cells, we could not get a good fit for this case; so these results are not provided.