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Representative experiments showing the zeta potential values (ζ) (a) or the average hydrodynamic diameter (dH) (b) as a function of the DS concentration. Composition: DOPG/DPPC 1:1 in NaCl 15 mM (black), CaCl2 10 mM (red) and CaCl2 25 mM (magenta); and DOTAP/DOPC 1:9 in NaCl 15 mM (a-blue) and 145 mM (b-blue). The error bars represent the standard deviation of two independent experiments.
