Figure 2

The effect of changing the hydrating salt cation in lipid systems of MO and DOPG. Bragg peaks in figs (a–c) have been indexed according to the Miller indicies of the reflection place, with Blue labels indicating a \({{\rm{Q}}}_{II}^{D}\) plane, and Black \({{\rm{Q}}}_{II}^{P}\) one. (a) 1D radially integrated SAXS pattern of increasing DOPG concentration measured in water; (b) increasing DOPG concentration measured in 0.1 M LiCl; (c) increasing DOPG concentration measured in 0.1 M CaCl₂. The effect of two concentrations - compared to water - of (d) NaCl on the phase and lattice parameter of a MO:DOPG cubic phase; (e) LiCl on the phase and lattice parameter of a MO:DOPG cubic phase; (f) CaCl₂ on the phase and lattice parameter of a MO: DOPG cubic phase. Further scattering 1D SAXS patterns of the NaCl and LiCl systems are in the Supplementary Information, Figures S1–3.