Fig. (18A) Small-angle X-ray scattering patterns of highly purified lipid A isolated from Escherichia coli F515 at 90 % water content and 80 °C. The logarithm of the scattering intensity is plotted versus the scattering vector s (=1/d, d = spacings of the reflections). The lipid A was kindly provided by U. Zähringer, Forschungszentrum Borstel. Own unpublished data