Molecular structures used in this study. DPPC: choline-(CH2)2 carbon (blue) and nitrogen (cyan), phosphate oxygen (orange) and phosphorus (yellow), glycerol-carbonyl (red), methylene carbon (black), terminal methyl (purple). DiI: chromophore (green), headgroup methyl (brown), nitrogen (pink), methylene carbon (black), alkene carbon (yellow-green), terminal methyl (purple). This color coding is used in Figures 3, 4, 5 and 10.