Sea UrchinsGastrulaMesodermEmbryo, NonmammalianCell DifferentiationMorphogenesisGene Expression Regulation, DevelopmentalUrochordataEctodermLytechinusBlastulaAsterinaChick EmbryoIn Situ HybridizationEmbryonic InductionTranscription FactorsOdontogenesisHomeodomain ProteinsSignal TransductionNotochordUreterFibroblast Growth FactorsLimb BudsToothRNA, MessengerMolecular Sequence DataCell LineageBody PatterningEpitheliumCells, CulturedEndodermMSX1 Transcription FactorBlastomeresExtremitiesStrongylocentrotus purpuratusBone Morphogenetic ProteinsBone Morphogenetic Protein 4Base SequenceFibroblast Growth Factor 9Embryonic DevelopmentStarfishTooth GermOrgan Culture TechniquesHedgehog ProteinsAmino Acid SequenceNeural CrestStem CellsEmbryo, MammalianFibroblast Growth Factor 10Embryonic and Fetal DevelopmentPalateExtracellular MatrixTime FactorsMice, TransgenicOrganogenesisCell MovementImmunohistochemistryLarvaCell DivisionSkullTretinoinQuailDNA, ComplementaryEpithelial CellsCartilageUrogenital SystemMice, KnockoutSequence Homology, Amino AcidCell ProliferationTrans-ActivatorsFibroblast Growth Factor 4Wnt ProteinsDNA-Binding ProteinsFibroblast Growth Factor 8Cloning, MolecularCell Line