CrystallographyCryoelectron MicroscopyNegative StainingCrystallography, X-RayElectronsPotassium AcetateCrystallizationModels, MolecularMicroscopy, ElectronProtein ConformationMembrane ProteinsProtein Structure, SecondaryLipid BilayersImage Processing, Computer-AssistedBacterial ProteinsMicroscopy, Electron, ScanningElectron TransportX-Ray DiffractionGamma RaysBinding SitesElectron Probe MicroanalysisRadiographySynchrotronsMicroscopy, Electron, TransmissionElectron Spin Resonance SpectroscopyProtein Structure, TertiaryMolecular ConformationMolecular Sequence DataMolecular StructureAmino Acid SequenceNuclear Magnetic Resonance, BiomolecularHydrogen BondingProtein BindingMagnetic Resonance SpectroscopyCatalytic DomainX-RaysNeutron DiffractionKineticsPneumoconiosisProtein Structure, QuaternaryElasmobranchiiSkates (Fish)ProteinsOxidation-ReductionLigandsCatalysisStructure-Activity RelationshipPhotoreceptors, MicrobialScattering, Small AngleModels, ChemicalMutationFast Neutrons