Gene Expression Regulation, DevelopmentalEmbryo, NonmammalianEmbryo, MammalianIn Situ HybridizationEmbryonic StructuresEmbryonic DevelopmentBody PatterningChick EmbryoZebrafishMesodermMolecular Sequence DataAmino Acid SequenceEmbryonic and Fetal DevelopmentLarvaMorphogenesisBlastocystHomeodomain ProteinsRNA, MessengerCell DifferentiationBase SequenceMice, TransgenicGastrulaNeuronsDrosophila ProteinsImmunohistochemistryOryziasPregnancyZebrafish ProteinsEyeTranscription FactorsNerve Tissue ProteinsTelencephalonCoturnixDrosophilaSequence Homology, Amino AcidDrosophila melanogasterMice, Inbred ICRZygoteHeartCloning, MolecularRhombencephalonNervous SystemBrainAnimals, NewbornReverse Transcriptase Polymerase Chain ReactionGene Expression ProfilingCentral Nervous SystemTime FactorsOvumStem CellsRetinaFetusNeural CrestDNA, ComplementaryMice, Inbred C57BLTissue DistributionGene ExpressionMutationPhenotypeAnimals, Genetically ModifiedMice, KnockoutLens, CrystallineOrgan SpecificityGerm CellsXenopusCell LineageChickensGenes, InsectNeurogenesisAxonsGestational AgeIntegrasesSignal TransductionGenes, HomeoboxGreen Fluorescent ProteinsDNA-Binding ProteinsSpinal CordDNA PrimersMice, Mutant StrainsXenopus laevisBlotting, NorthernMicroscopy, FluorescenceCells, CulturedCerebral CortexTranscription, GeneticCell MovementSequence AlignmentGene Expression RegulationOocytesRNABlotting, WesternProtein IsoformsGene LibraryAgingEnhancer Elements, GeneticMyocardiumDNAMice, Inbred StrainsCell DivisionPromoter Regions, Genetic