Genes, HomeoboxHomeodomain ProteinsGene Expression Regulation, DevelopmentalTranscription FactorsMolecular Sequence DataOtx Transcription FactorsLIM-Homeodomain ProteinsIn Situ HybridizationBase SequenceAmino Acid SequenceMSX1 Transcription FactorAntennapedia Homeodomain ProteinGoosecoid ProteinAvian ProteinsBody PatterningTrans-ActivatorsSequence Homology, Amino AcidMorphogenesisRepressor ProteinsCell DifferentiationEmbryo, NonmammalianDrosophila ProteinsDrosophilaMesodermEye ProteinsDNA-Binding ProteinsCloning, MolecularGene ExpressionMultigene FamilyEndodermMutationExtremitiesPhenotypeMeristemNerve Tissue ProteinsDNA, ComplementaryRNA, MessengerPromoter Regions, GeneticEctodermZebrafish ProteinsChordata, NonvertebrateGene Expression RegulationProsencephalonEmbryonic and Fetal DevelopmentHeadVertebratesTranscription, GeneticEmbryo, MammalianSequence AlignmentEyeNervous SystemChick EmbryoDNA PrimersChromosome MappingTelencephalonGenes, InsectEmbryonic InductionNuclear ProteinsMice, TransgenicPhylogenyCell LineageMice, Mutant StrainsRhombencephalonReverse Transcriptase Polymerase Chain ReactionCentral Nervous SystemDNAStem CellsBone Morphogenetic ProteinsBone Morphogenetic Protein 4Plant ProteinsConserved SequenceRetinaBlotting, NorthernSequence Homology, Nucleic AcidBranchial RegionMice, KnockoutImmunohistochemistryBasic Helix-Loop-Helix Transcription FactorsPOU Domain FactorsEvolution, MolecularGenes, ReporterCell LineCaenorhabditis elegans ProteinsAnimals, Genetically ModifiedSignal TransductionAnophthalmosPolymerase Chain ReactionDiencephalonEye AbnormalitiesXenopus laevisMice, Inbred C57BLBiological EvolutionTranscriptional ActivationLac OperonPlanariansGenes, PlantEmbryonic StructuresMesencephalonEnhancer Elements, GeneticUrochordata