NotochordUrochordataCiona intestinalisFetal ProteinsEmbryonic InductionEmbryo, NonmammalianMesodermZebrafishGene Expression Regulation, DevelopmentalGastrulaT-Box Domain ProteinsSomitesBody PatterningIn Situ HybridizationTailZebrafish ProteinsHepatocyte Nuclear Factor 3-betaChick EmbryoMorphogenesisHedgehog ProteinsOrganizers, EmbryonicChordata, NonvertebrateNervous SystemEndodermSpineCentral Nervous SystemChordomaXenopus ProteinsCoturnixQuailChordataXenopus laevisGastrulationEctodermBlastomeresMolecular Sequence DataFetal Tissue TransplantationGoosecoid ProteinHomeodomain ProteinsTranscription FactorsCell DifferentiationIntervertebral Disc