Figure 3.

Leakage data for surfactins (SFs, open squares), C₁₂EO₈ (open circles), and mixtures thereof (solid symbols) acting on 30 μM POPC vesicles. (Bars in symbols distinguish independent data sets.) (A) Dye efflux after 1 h, E, as a function of the concentration of SF (for pure SF and mixtures) or C₁₂EO₈. (Solid symbols) Mixtures of four series with constant C₁₂EO₈ of 10 μM (pentagons), 25 μM (right-pointing triangles), 35 μM (diamonds), and 45 μM (left-pointing triangles), respectively, and variable SF (see abscissa). (Solid lines) Values calculated using Eq. 3 assuming additive action (CI = 1) (dashed lines are to guide the eye only). Concerted action is additive, within error. (B) E as a function of the fluorescence lifetime of entrapped dye, τ_E, on a reciprocal scale. To see this figure in color, go online.