Organ Culture TechniquesTissue Culture TechniquesCulture TechniquesCartilage, ArticularMesodermCells, CulturedChick EmbryoEmbryonic InductionChorionic VilliChondrocytesGene Expression Regulation, DevelopmentalEctodermProteoglycansMorphogenesisLimbus CorneaeCattleCell DifferentiationXenopus ProteinsGastrulaAggrecansEpitheliumPregnancyCartilageRNA, MessengerGlycosaminoglycansIn Situ HybridizationCell MovementImmunohistochemistryAmnionPlacentaBone Morphogenetic ProteinsKinetinTime FactorsEpithelial CellsTrophoblastsSignal TransductionNeuritesCulture MediaXenopusFallopian TubesCell Culture TechniquesMammary Glands, AnimalPlant Somatic Embryogenesis TechniquesCoculture TechniquesXenopus laevisProcollagen N-EndopeptidaseMicroscopy, Electron, ScanningEmbryo, NonmammalianAxonsOsteoarthritisCollagenCiliary Neurotrophic Factor Receptor alpha SubunitCell DivisionReverse Transcriptase Polymerase Chain ReactionBody PatterningActivinsFibroblast Growth FactorsEndometriumNeural CrestFetusCulture Media, ConditionedSkinPlant ShootsLens, CrystallineCollagenasesRetinaMicroscopy, Phase-ContrastTracheaMicroscopy, ElectronNervous SystemGene ExpressionBone Morphogenetic Protein 4Animals, NewbornNaphthaleneacetic AcidsTissue TransplantationExtracellular MatrixHomeodomain ProteinsTriturusInterleukin-1Fibroblast Growth Factor 2Cell SurvivalRabbitsLungNotochordGlycoproteinsTrigeminal GanglionEndodermExtracellular Matrix ProteinsFluorescent Antibody Technique, IndirectNeuronsEmbryo, MammalianCollagen Type IIPeriosteumDose-Response Relationship, DrugTransforming Growth Factor betaTranscription FactorsSwineBlotting, WesternHedgehog ProteinsMice, Inbred C57BL