Cell DifferentiationBlood VesselsGene Expression Regulation, DevelopmentalNeovascularization, PhysiologicEmbryo, MammalianSignal TransductionCells, CulturedEmbryo, NonmammalianEmbryonic Stem CellsStem CellsTranscription FactorsCell LineageZebrafishRNA, MessengerCell LineMice, KnockoutMolecular Sequence DataMice, Inbred C57BLCell DivisionCell ProliferationEmbryonic DevelopmentGene Expression RegulationMice, TransgenicEndothelial CellsIn Situ HybridizationRetinal VesselsBase SequenceEmbryo LossDNA-Binding ProteinsMorphogenesisPhenotypeYolk SacVascular Endothelial Growth Factor AImmunohistochemistryReverse Transcriptase Polymerase Chain ReactionHomeodomain ProteinsReceptors, NotchTretinoinZebrafish ProteinsMesodermChick EmbryoCell MovementEphrin-B2Embryonic and Fetal DevelopmentGene ExpressionBasic Helix-Loop-Helix Transcription FactorsEndothelium, VascularMutationTranscription, GeneticReceptor, TIE-1Receptor, TIE-2Models, BiologicalTrans-ActivatorsVascular Endothelial Growth Factor Receptor-2Receptor, EphB4Promoter Regions, GeneticGene Expression ProfilingAmino Acid SequenceNuclear ProteinsQuailTime FactorsSex DifferentiationPregnancyBlotting, WesternTransfectionDNA PrimersCell CycleReceptors, TIEApoptosisRetinal NeovascularizationCarcinoma, EmbryonalAnimals, NewbornBlastocystMembrane ProteinsBone Morphogenetic ProteinsCoturnixAnimals, Genetically ModifiedRepressor ProteinsEndodermDown-RegulationReceptor, Notch1Plant Vascular BundleCell Culture TechniquesTransforming Growth Factor betaUp-RegulationProto-Oncogene ProteinsPlacentationHematopoietic Stem CellsAntigens, CD31TeratomaNeovascularization, PathologicOrganogenesisCell AggregationMice, Mutant StrainsTumor Cells, CulturedCell SurvivalPericytesReceptors, Vascular Endothelial Growth FactorFluorescent Antibody TechniqueFlow Cytometry