Ear, ExternalEar Deformities, AcquiredBody PiercingEar AuricleBlood Gas Monitoring, TranscutaneousEar NeoplasmsBlood Specimen CollectionPuncturesBlood Gas AnalysisHelix (Snails)Radial ArteryOximetryPartial PressureCarbon DioxideProtein Structure, SecondaryOxygenModels, MolecularMolecular Sequence DataAmino Acid SequenceProtein ConformationProtein Structure, TertiaryNucleic Acid ConformationBinding SitesCrystallography, X-RayHydrogen BondingProtein BindingMagnetic Resonance SpectroscopyNuclear Magnetic Resonance, BiomolecularProtein FoldingMutagenesis, Site-DirectedBase SequenceThermodynamicsStructure-Activity RelationshipMutationHydrophobic and Hydrophilic InteractionsEscherichia coliPeptidesDNASequence Homology, Amino AcidDimerizationAmino Acid SubstitutionModels, ChemicalSequence AlignmentHederaSolutionsKineticsMolecular Dynamics SimulationAmino Acid MotifsProtein Structure, Quaternary