IsomerismHeterotaxy SyndromeHeart Defects, CongenitalHeart AtriaSitus InversusHeart Septal DefectsAbnormalities, MultipleVenae CavaeDextrocardiaProtein ConformationLevocardiaHeart Bypass, RightPulmonary VeinsErythrocruorinsModels, MolecularPulmonary Veno-Occlusive DiseaseGrowth Differentiation Factor 1Fetal HeartCyanosisAbortion, EugenicMagnetic Resonance SpectroscopyNodal ProteinAtrioventricular NodeFetal DiseasesVena Cava, InferiorFontan ProcedureAzygos VeinTachycardia, SupraventricularSinoatrial NodeHeart BlockProlineCrystallography, X-RayBinding SitesStereoisomerismUltrasonography, PrenatalMolecular ConformationMolecular StructureHeart ValvesProtein BindingProtein Structure, SecondaryAtrial AppendageProtein Structure, TertiaryHeart Septal Defects, AtrialCircular DichroismThermodynamicsPrenatal DiagnosisMolecular Sequence DataAmino Acid SequenceInfant, NewbornKineticsSyndromeBody PatterningSpectrometry, FluorescencePregnancyEchocardiographyModels, ChemicalProtein FoldingMolecular Dynamics SimulationHydrogen BondingLigandsStructure-Activity RelationshipNuclear Magnetic Resonance, BiomolecularAsiaNucleic Acid ConformationGestational AgeHydrogen-Ion ConcentrationProtein DenaturationTemperatureSpleenEscherichia coliComputer SimulationMutationSolutionsTime FactorsStomachProtein Structure, QuaternaryMutagenesis, Site-DirectedCatalysisRetrospective StudiesCatalytic DomainRecombinant ProteinsDimerizationSpectrometry, Mass, Fast Atom BombardmentSpectrophotometry, UltravioletAllosteric RegulationTryptophanSolventsProteinsWaterPeptidesSubstrate SpecificityStatic ElectricityAmino Acid SubstitutionCysteineBacterial ProteinsPolymorphism, Single-Stranded ConformationalFluorescence Resonance Energy TransferHydrolysisTreatment OutcomeX-Ray Diffraction