Gene Expression Regulation, DevelopmentalBody PatterningCell LineageHomeodomain ProteinsEmbryo, NonmammalianCell DifferentiationTranscription FactorsMesodermEndodermZebrafish ProteinsIn Situ HybridizationReceptors, NotchZebrafishEctodermReference StandardsDrosophila ProteinsEmbryonic InductionMorphogenesisBasic Helix-Loop-Helix Transcription FactorsSignal TransductionStem CellsDrosophilaXenopus ProteinsGenes, HomeoboxGastrulaBone Morphogenetic ProteinsLIM-Homeodomain ProteinsNodal ProteinModels, BiologicalWnt ProteinsAnimals, Genetically ModifiedHedgehog ProteinsEmbryonic Stem CellsMutationNerve Tissue ProteinsChick EmbryoNeural PlateMolecular Sequence DataDNA-Binding ProteinsT-Box Domain ProteinsNeural CrestPhenotypeBlastomeresEmbryonic DevelopmentNotochordBone Morphogenetic Protein 4Otx Transcription FactorsOrganogenesisNeuronsGastrulationVulvaCaenorhabditis elegansEyeRepressor ProteinsGATA Transcription FactorsTrans-ActivatorsGenes, InsectCaenorhabditis elegans ProteinsPaired Box Transcription FactorsDrosophila melanogasterRhombencephalonSea UrchinsGerm CellsNeurogenesisEmbryo, MammalianNervous SystemTime FactorsFibroblast Growth FactorsWnt1 ProteinStrongylocentrotus purpuratusStandard of CarePhotoreceptor Cells, InvertebrateXenopusLarvaTelencephalonGerm LayersReproducibility of ResultsBase SequenceSOXF Transcription FactorsQuality ControlAvian ProteinsCentral Nervous SystemMorpholinosAmino Acid SequenceEye ProteinsSense OrgansFetal ProteinsWingInsect Proteinsbeta CateninMice, TransgenicSensitivity and SpecificityBlastulaUrochordataCell PolarityCompound Eye, ArthropodMembrane ProteinsEmbryonic StructuresGenes, HelminthImmunohistochemistry