Organizers, EmbryonicGoosecoid ProteinNucleolus Organizer RegionBody PatterningNodal Signaling LigandsZebrafish ProteinsZebrafishGene Expression Regulation, DevelopmentalHomeodomain ProteinsEmbryonic InductionNodal ProteinGastrulaXenopus ProteinsIn Situ HybridizationSilver StainingFunctional LateralityEmbryologyOtx Transcription FactorsEmbryo, NonmammalianMesodermXenopusTranscription FactorsFibroblast Growth Factor 8Caenorhabditis elegansGenes, HelminthRhombencephalonNotochordHydraMesencephalonIntercellular Signaling Peptides and ProteinsAxisWnt ProteinsHeadEctodermBone Morphogenetic ProteinsXenopus laevisEnzyme InductionMolecular Sequence DataCaenorhabditis elegans ProteinsTissue TransplantationNervous SystemMorphogenesisSignal TransductionLIM-Homeodomain ProteinsSilverBase SequenceCell NucleolusMutationDominance, CerebralGenes, HomeoboxWnt1 ProteinActivinsLeft-Right Determination FactorsEndodermHeartVentricular Function, LeftMetencephalonProteinsT-Box Domain ProteinsNeuronsRNA, MessengerFetal ProteinsBlastulaGlycoproteinsFibroblast Growth FactorsBrainTwins, ConjoinedMovementChick EmbryoBlastodermTransforming Growth Factor betaBone Morphogenetic Protein 4Time FactorsRepressor ProteinsAmino Acid SequenceDNA-Binding ProteinsVentricular Dysfunction, LeftMatrix Attachment Region Binding ProteinsTrans-ActivatorsMagnetic Resonance ImagingSilver Nitratebeta CateninVentricular Function, RightBrain MappingHepatocyte Nuclear Factor 3-betaAmphibiansInhibinsCell DifferentiationTectum MesencephaliNeural PlateHedgehog ProteinsVentricular Dysfunction, RightHuman RightsTranscription, GeneticProsencephalonNerve Tissue ProteinsMicroinjectionsCarrier ProteinsChromosomesDrug Packaging