SphingomyelinsSphingomyelin PhosphodiesteraseCeramides3',5'-Cyclic-AMP PhosphodiesterasesCyclic Nucleotide Phosphodiesterases, Type 4Cyclic Nucleotide Phosphodiesterases, Type 3Phosphoric Diester HydrolasesCell MembraneCyclic Nucleotide Phosphodiesterases, Type 1Cyclic Nucleotide Phosphodiesterases, Type 23',5'-Cyclic-GMP PhosphodiesterasesPhosphodiesterase Inhibitors2',3'-Cyclic-Nucleotide PhosphodiesterasesCyclic Nucleotide Phosphodiesterases, Type 5RolipramCyclic GMPMembrane LipidsCyclic Nucleotide Phosphodiesterases, Type 7MembranesCyclic AMPIntracellular MembranesPhosphatidylcholinesMembranes, ArtificialPurinonesPhosphodiesterase 4 InhibitorsMembrane PotentialsPhosphodiesterase 3 InhibitorsNucleotides, CyclicTransferases (Other Substituted Phosphate Groups)Membrane Fluidity1-Methyl-3-isobutylxanthineSphingolipidsPhosphorus-Oxygen LyasesErythrocyte MembranePhosphodiesterase IGlucosylceramidesLipid BilayersIsoenzymesHydrolysisKinetics4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinoneCell Membrane PermeabilityCholesterolPyrrolidinonesPhospholipidsMolecular Sequence DataMilrinoneSphingosineBasement MembraneAmino Acid SequenceLiposomesSignal TransductionSecond Messenger SystemsCell LineGlycerylphosphorylcholineCells, CulturedCyclic AMP-Dependent Protein KinasesNiemann-Pick DiseasesProtein Structure, TertiaryPhosphodiesterase 5 InhibitorsCyclic P-OxidesCalciumCattlePhosphatidylethanolaminesSubcellular FractionsModels, BiologicalChromatography, Thin LayerProtein BindingMembrane MicrodomainsGolgi ApparatusFetal Organ MaturityDetergentsModels, MolecularCeramidasesEnzyme ActivationAdenylate CyclaseSerine C-PalmitoyltransferaseSubstrate SpecificityCyclic GMP-Dependent Protein KinasesBacterial ProteinsCatalytic DomainBrefeldin AMembrane Transport ProteinsMicroscopy, ElectronMembrane GlycoproteinsAmniotic FluidPyrophosphatasesBinding Sites