NotochordGenes, DevelopmentalGene Expression Regulation, DevelopmentalFetal ProteinsUrochordataIntestinal AtresiaCiona intestinalisGenes, HomeoboxT-Box Domain ProteinsHepatocyte Nuclear Factor 3-betaZebrafishZebrafish ProteinsIn Situ HybridizationHomeodomain ProteinsEmbryonic InductionEmbryo, NonmammalianMesodermBody PatterningGastrulaSomitesMorphogenesisTailChick EmbryoTranscription FactorsHedgehog ProteinsChordata, NonvertebrateMolecular Sequence DataOrganizers, EmbryonicNervous SystemEndodermCentral Nervous SystemGoosecoid ProteinAmino Acid SequenceEctodermBase Sequence