FIGURE 4.

Elastic incoherent structure factors (A₀) determined from difference spectra (see Fig. 2) given for the folded state (a) and the unfolded state (b) at three different temperatures. The statistical error of the obtained A₀ (symbols, see also Fig. 2 c) is about ±4%. The solid lines represent structure factors calculated on the basis of the diffusion inside a sphere model. The corresponding model parameters (radius of the sphere) are given in Table 1.