LampreysNotochordPetromyzonCircular DichroismDNA, CircularUrochordataCiona intestinalisFetal ProteinsHagfishesEmbryonic InductionEmbryo, NonmammalianGene Expression Regulation, DevelopmentalMesodermZebrafishChordata, NonvertebrateGastrulaT-Box Domain ProteinsBody PatterningIn Situ HybridizationSomitesMolecular Sequence DataTailSpinal CordVertebratesFishesZebrafish ProteinsPhysiology, ComparativeMorphogenesisChick EmbryoAmino Acid SequenceHepatocyte Nuclear Factor 3-betaHedgehog ProteinsChordataOrganizers, EmbryonicSwimmingBase SequenceLarvaPhylogenyCentral Nervous SystemNervous SystemReticular FormationEndodermSpineLocomotionXenopus ProteinsPyrrolidonecarboxylic AcidChordomaSequence Homology, Amino AcidCoturnixQuailXenopus laevisBiological EvolutionHomeodomain ProteinsEvolution, MolecularTranscription FactorsNeural CrestGastrulationEctoderm