Cell DifferentiationMesodermGene Expression Regulation, DevelopmentalMorphogenesisIn Situ HybridizationTranscription FactorsCells, CulturedChick EmbryoSignal TransductionOdontogenesisStem CellsHomeodomain ProteinsUreterLimb BudsEpitheliumBone Morphogenetic ProteinsToothCell LineageRNA, MessengerExtremitiesMSX1 Transcription FactorEmbryonic InductionCell DivisionBone Morphogenetic Protein 4Embryo, MammalianTretinoinCell LineCell ProliferationSex DifferentiationEmbryonic Stem CellsOrgan Culture TechniquesMice, TransgenicMolecular Sequence DataHedgehog ProteinsEctodermImmunohistochemistryFibroblast Growth Factor 9Neural CrestGene Expression RegulationDNA-Binding ProteinsMice, KnockoutTooth GermFibroblast Growth FactorsBase SequenceEmbryonic and Fetal DevelopmentMice, Inbred C57BLFibroblast Growth Factor 10OsteogenesisPhenotypeTrans-ActivatorsEpithelial CellsReverse Transcriptase Polymerase Chain ReactionGene ExpressionOrganogenesisPalateEndodermCartilageSkullQuailOsteoblastsWnt ProteinsAntigens, DifferentiationBody PatterningMesenchymal Stromal CellsSea UrchinsTime FactorsBone Morphogenetic Protein 2Embryo, NonmammalianBasic Helix-Loop-Helix Transcription FactorsModels, BiologicalFibroblast Growth Factor 4Transcription, GeneticUrogenital SystemChondrogenesisTransforming Growth Factor betaCoturnixAdipogenesisMutationFibroblast Growth Factor 8Bone Morphogenetic Protein 7Amino Acid SequenceMice, Mutant StrainsNerve Tissue ProteinsGene Expression ProfilingNeuronsMuscle DevelopmentCell Culture TechniquesT-Box Domain ProteinsPromoter Regions, GeneticNuclear ProteinsDNA PrimersProto-Oncogene ProteinsMyoblastsEpidermisBranchial RegionKeratinocytesHematopoietic Stem CellsKidneyApoptosisProteins