... the objectives of this study were to analyze (a) the effect of KL4on the physical properties of membranes, in the absence andpresence of Ca2+, using fluorescence anisotropy of 1,6-diphenyl-1,3,5-hexatriene ... FEBSspecifically examine the interaction of KL4with POPGand PA as well as the effect of these lipids on the physical properties of the membrane.Effect of KL4on the lipid order of surfactant-likemembranesTo ... change.However, KL4induced narrowing of the phase trans-ition, which is a measure of stabilization of DPPC-rich assemblies.Effect of calcium on the thermotropic properties of KL4-containing membranesIn...