2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/135557We reproduce the symmetric and asymmetric ``rippled'' $P_{β'}$ states of lipid membranes by Monte Carlo simulations of a coarse-grained molecular model for lipid-solvent mixtures. The structure and properties compare favorably with experiments. The asymmetric ripple state is characterized by a periodic array of fully interdigitated ``defect'' lines. The symmetric ripple state maintains a bilayer structure, but is otherwise structurally similar. The formation of both ripple states is driven by the propensity of lipid molecules with large head groups to exhibit splay.4 pages, 4 figuresBiological PhysicsChemical Physicstext