NotochordCiona intestinalisGastrulaGenes, HomeoboxUrochordataFetal ProteinsEmbryo, NonmammalianHomeodomain ProteinsEmbryonic InductionGene Expression Regulation, DevelopmentalMesodermBody PatterningIn Situ HybridizationZebrafishOrganizers, EmbryonicT-Box Domain ProteinsZebrafish ProteinsXenopus ProteinsMorphogenesisSomitesGoosecoid ProteinEctodermEndodermNervous SystemTailXenopus laevisTranscription FactorsChick EmbryoMolecular Sequence DataGastrulationChordata, NonvertebrateHepatocyte Nuclear Factor 3-betaHedgehog ProteinsXenopusBlastulaCentral Nervous SystemAmino Acid SequenceBone Morphogenetic ProteinsChordataBase SequenceBlastomeresTrans-ActivatorsCell DifferentiationLIM-Homeodomain ProteinsPleurodelesSequence Homology, Amino Acid