Animal Use AlternativesDisease Models, AnimalZebrafish ProteinsModels, AnimalEmbryo, NonmammalianAnimals, Genetically ModifiedGene Expression Regulation, DevelopmentalMorpholinosIn Situ HybridizationBody PatterningLarvaMolecular Sequence DataAnimal FinsMutationLateral Line SystemPhenotypeAmino Acid SequenceGreen Fluorescent ProteinsSignal TransductionMice, Inbred C57BLRhombencephalonSomitesEmbryonic DevelopmentHuntington DiseaseGene Knockdown TechniquesNeuronsModels, BiologicalBase SequenceCell DifferentiationMorphogenesisNeurodegenerative DiseasesOligonucleotides, AntisenseMice, TransgenicModels, GeneticNodal Signaling LigandsBrainHomeodomain ProteinsNerve Tissue ProteinsGastrulationRNA, MessengerNotochordTranscription FactorsDrug Evaluation, PreclinicalPhylogenyReverse Transcriptase Polymerase Chain ReactionMice, Knockout1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridineSequence Homology, Amino AcidTransgenesChromosome Mapping