From the experimentally determined AFM lattice parameters above we estimate the water channel diameters to be 74.4 and 105.5 Å for MO:DOPS 98:2 and MO:DOPS:CHOL 67:3:30 mol% respectively. Our estimate assumes that a.) the center of the water channel runs parallel to the minimal surface and b.) for lipid length we used 18Å as the monolayer thickness of MO in the Pn3m phase in excess water at 25°C which was calculated to be between 17-19Å. Although MO is the major component, the molecular parameters for these mixtures which include CHOL and DOPS are not known.