Cell MembraneMembrane FusionErythrocyte MembraneCell FusionMembranesMembrane LipidsCell LineViral Fusion ProteinsCell Membrane PermeabilityRecombinant Fusion ProteinsIntracellular MembranesBacterial ProteinsVirus InternalizationMembrane PotentialsVacuolesHost-Parasite InteractionsHost-Pathogen InteractionsErythrocytesAmino Acid SequenceMolecular Sequence DataMembranes, ArtificialMicroscopy, ElectronHeLa CellsMembrane FluidityViral Envelope ProteinsProtein BindingProtein TransportEscherichia coliMutationShigella flexneriMembrane GlycoproteinsProtein Structure, TertiaryCercopithecus aethiopsCells, CulturedMicroscopy, FluorescenceMicroscopy, ImmunoelectronVirionBacterial AdhesionVirus ReplicationCricetinaeVero CellsViral ProteinsMembrane ProteinsPlasmodium falciparumSpinal FusionVirulenceHIV Envelope Protein gp41Models, MolecularGene FusionBasement MembraneBinding SitesProtozoan ProteinsBase SequenceLipid BilayersMacrophagesModels, BiologicalOncogene Proteins, FusionMembrane Transport ProteinsLiposomesBacterial Outer Membrane ProteinsAntigens, BacterialCarrier ProteinsHydrogen-Ion ConcentrationHIV-1CalciumPhospholipidsCloning, MolecularCytoplasmMitochondrial MembranesMicroscopy, ConfocalKineticsElectrophoresis, Polyacrylamide GelTemperatureTime FactorsEndocytosisGreen Fluorescent ProteinsSignal TransductionRecombinant ProteinsPlasmidsSequence Homology, Amino AcidHost SpecificityTransfectionCell FractionationSynaptic MembranesMolecular WeightPhosphatidylcholinesRabbitsFluorescent Antibody TechniqueProtein ConformationPeptidesDetergentsBlotting, WesternEndoplasmic ReticulumEpithelial CellsCell Membrane StructuresGolgi ApparatusCHO CellsPotassiumCattleFreeze Fracturing