FiltrationMicropore FiltersMembranes, ArtificialMembranesCell MembraneMembrane LipidsIntracellular MembranesMembrane PotentialsVena Cava FiltersErythrocyte MembraneMembrane FluidityCell Membrane PermeabilityBasement MembraneMembrane Transport ProteinsAir FiltersMembrane GlycoproteinsLipid BilayersMicroscopy, ElectronMitochondrial MembranesProtein TransportSynaptic MembranesCell LineModels, BiologicalProtein BindingLiposomesCalciumHydrogen-Ion ConcentrationCell FractionationProtein Structure, TertiaryPaperCarrier ProteinsCells, CulturedMutationMolecular Sequence DataElectrophoresis, Polyacrylamide GelDetergentsExtraembryonic MembranesMicroscopy, FluorescenceBacterial ProteinsEscherichia coliPhosphatidylcholinesEndoplasmic ReticulumPotassiumGolgi ApparatusTime FactorsMolecular WeightTemperatureAmino Acid SequenceFreeze FracturingModels, Molecular