FIGURE 5.
Small- and wide-angle scattering of DMPG (i), DPPG (ii), and DSPG (iii) in the gel phase in the absence and presence of PGLa (P/L = 1:25). (A) SAXS data on a logarithmic scale with an increment of 10. (B) WAXS data on a linear scale with an increment of 1000. Solid lines show the model fits to the data in the absence of PGLa, and dashed lines to the data in the presence of PGLa. The resulting uncertainties of the model parameters are presented in Table 2 and Fig. 7. Dash-dotted lines correspond to fits of a single bilayer phase. Fits to the WAXS patterns were performed using a combination of Gaussian distribution and are presented here for illustration purposes only. The pattern of pure DSPG shows a coexistence of orthorhombically and hexagonally packed hydrocarbon chains corresponding to the Lβ′ and LβI phases, respectively (dash-dotted lines). A detailed WAXS data analysis has been presented previously (24). The selected temperatures are 5°C for DMPG, 30°C for DPPG, and 45°C for DSPG. Data have been scaled for a better view.