S100 ProteinsLigandsMicroscopy, ElectronElectronsElectron TransportMicroscopy, Electron, ScanningMicroscopy, Electron, TransmissionElectron Spin Resonance SpectroscopyCD40 LigandFas Ligand ProteinModels, MolecularProtein BindingMolecular Sequence DataBinding SitesOxidation-ReductionMicroscopy, Electron, Scanning TransmissionKineticsAmino Acid SequenceProtein ConformationRANK LigandElectron Probe MicroanalysisMembrane GlycoproteinsElectron Transport Complex IVCrystallography, X-RayCell LineSignal TransductionProtein Structure, TertiaryCells, CulturedCD30 LigandElectron Transport Complex IIITNF-Related Apoptosis-Inducing LigandCell MembraneMolecular StructureMembrane ProteinsRecombinant ProteinsHemeOX40 LigandMutationModels, ChemicalStructure-Activity RelationshipSpectrophotometryMice, Inbred C57BLBase SequenceBinding, CompetitiveCytochrome c GroupCryoelectron MicroscopyBacterial ProteinsPeptidesHydrogen-Ion ConcentrationThermodynamicsOxidoreductasesReceptors, Cell SurfaceMicroscopy, ImmunoelectronEscherichia coliModels, BiologicalOxygenElectron Transport Chain Complex ProteinsMolecular Conformation