Figure 9.
Schematic for the packing of lipid and water in the hexagonal II phase. The cylindrical water tubes extend in the direction perpendicular to the page, with the tube’s center at 0. The triangle extending from 0 to R1 represents the piece-of-pie space occupied by a monolayer of lipid and peptide and its associated water. The dark blue triangle is occupied by water. The lower green trapezoid is the hydrophobic volume. The region between RS and RC represents the interfacial region, which is occupied by water (light blue) and lipid headgroup (red). FP23 is located partially in the red region and partially in the green region. The pivotal plane is at R0P. Figure from Ref. [6].