Nervous SystemGene Expression Regulation, DevelopmentalEnteric Nervous SystemCentral Nervous SystemAxonsNeuronsPeripheral Nervous SystemZebrafishNerve Tissue ProteinsEmbryo, NonmammalianIn Situ HybridizationDrosophila ProteinsHirschsprung DiseaseHomeodomain ProteinsNeurogenesisBrainDrosophilaNeural CrestNeuritesTranscription FactorsOptic Lobe, NonmammalianSignal TransductionNeurogliaOcular Physiological PhenomenaEyeStichopusCell DifferentiationBody PatterningPaired Box Transcription FactorsDrosophila melanogasterGrowth ConesMutationNeural TubeSemaphorinsLarvaZebrafish ProteinsImmune SystemAnimals, NewbornMolecular Sequence DataPhotoreceptor Cells, InvertebratePhenotypeImmunohistochemistryNeural Cell Adhesion MoleculesOlfactory PathwaysSOXE Transcription FactorsRetinaNeural Stem CellsProto-Oncogene Proteins c-retMice, KnockoutBasic Helix-Loop-Helix Transcription FactorsMice, TransgenicKallmann SyndromeCell MovementVisual PathwaysGene Expression ProfilingGenes, InsectAnimals, Genetically ModifiedEmbryo, MammalianRhombencephalonNerve Growth FactorsAmino Acid SequenceStem CellsCell Adhesion Molecules, NeuronalCells, CulturedBase SequenceMice, Inbred C57BLMorphogenesisEmbryonic DevelopmentLIM-Homeodomain ProteinsSpinal CordCaenorhabditis elegansInformation SystemsEmbryonic and Fetal DevelopmentSchwann CellsMotor NeuronsCell LineageRNA, MessengerGene Regulatory NetworksChick EmbryoUreterSoftware DesignGene TargetingReceptors, NotchDNA-Binding ProteinsOligonucleotide Array Sequence AnalysisOrgan SpecificityRepressor ProteinsVertebratesGene ExpressionDendritesPregnancyMicroarray AnalysisInsect ProteinsGene Expression RegulationCerebellumSequence Homology, Amino AcidCaenorhabditis elegans ProteinsSensory Receptor CellsTime FactorsSequence Alignment