PlacentaPlacenta DiseasesSubstrate SpecificityPlacenta PreviaPlacenta AccretaPlacenta, RetainedPregnancyTrophoblastsKineticsMolecular Sequence DataAmino Acid SequenceChorionic VilliMaternal-Fetal ExchangePregnancy ProteinsPlacentationBinding SitesCatalysisModels, MolecularBase SequenceFetusProtein BindingPre-EclampsiaHydrolysisEscherichia coliRecombinant ProteinsHydrogen-Ion ConcentrationGestational AgeCatalytic DomainSequence Homology, Amino AcidExtraembryonic MembranesChorionPregnancy Trimester, ThirdCloning, MolecularCrystallography, X-RayProtein ConformationProtein Structure, TertiaryPregnancy, AnimalPhosphorylationPregnancy Trimester, FirstPlacental LactogenDeciduaMutagenesis, Site-DirectedMutationPlacental CirculationMolecular WeightChoriocarcinomaElectrophoresis, Polyacrylamide GelStructure-Activity RelationshipCattleCell LineOxidation-ReductionFetal Growth RetardationUterusIsoenzymesSequence AlignmentLiverBiological TransportCells, CulturedEnzyme ActivationAmino AcidsFetal DevelopmentChromatography, High Pressure LiquidBacterial ProteinsAdenosine TriphosphateMolecular StructureCarrier ProteinsImmunohistochemistryPlacental HormonesDNA, ComplementaryDNAModels, ChemicalDNA PrimersGene ExpressionPeptidesStereoisomerismModels, BiologicalAmnionAbortion, VeterinaryTime FactorsTissue DistributionEndopeptidasesOligopeptidesBlotting, WesternChromatography, GelCesarean SectionTemperatureLabor, ObstetricPregnancy Trimester, SecondEnzyme InhibitorsSubstrate CyclingAmniotic FluidProteinsMembrane ProteinsPregnancy Complications, ParasiticEscherichia coli ProteinsUmbilical CordEnzyme StabilityYolk SacHydatidiform MoleSaccharomyces cerevisiae