Egg YolkYolk SacCholine KinaseCholine O-AcetyltransferaseCholine DeficiencyHemicholinium 3BetaineCytidine Diphosphate CholineCholine DehydrogenasePhosphatidylcholinesPhosphorylcholineEgg ProteinsPhosphatidylethanolamine N-MethyltransferaseGlycerylphosphorylcholineEthanolamineEndodermal Sinus TumorLipotropic AgentsDeanolVitelline MembranePhospholipidsAcetylcholineSarcosinePhosphatidylethanolaminesEthanolaminesCreatineMagnetic Resonance SpectroscopyMesonephromaMethionineInositolCholine-Phosphate CytidylyltransferaseChickensCholinergic FibersLiverAcetylcholinesteraseVesicular Acetylcholine Transport ProteinsBetaine-Aldehyde DehydrogenasePregnancyDiacylglycerol CholinephosphotransferaseKineticsNootropic AgentsOvumEndodermEmbryo, MammalianThiocholineMembrane Transport ProteinsBiological TransportPhosvitinAspartic AcidDietCholinergic AgentsSodiumTritiumAmino AlcoholsEgg Proteins, DietarySphingomyelinsFood, OrganicLysophosphatidylcholinesBrainMolecular Sequence DataHematopoiesis, ExtramedullaryPhysostigmineCarbon RadioisotopesEgg WhiteTime FactorsOviparityBetaine-Homocysteine S-MethyltransferaseEgg ShellPinocytosisPlasmalogensChromatography, Thin LayerEmbryo, NonmammalianEmbryonic and Fetal DevelopmentPlacentaFetusGene Expression Regulation, DevelopmentalChick EmbryoRats, Inbred StrainsParasympathetic Nervous SystemCholinergic NeuronsBiological Transport, ActivePhospholipase DCryoprotective AgentsNucleotidyltransferasesPhospholipasesalpha-FetoproteinsLithiumAmino Acid SequenceRNA, MessengerSeptum of BrainCarbon IsotopesEthanolaminephosphotransferaseOrganic Cation Transport ProteinsPotassiumPhosphotransferasesCells, CulturedMicroscopy, ElectronExtraembryonic MembranesFat BodyFolic AcidNutritional Requirements