Cyclic AMPPhosphodiesterase Inhibitors3',5'-Cyclic-AMP PhosphodiesterasesPhosphoric Diester Hydrolases3',5'-Cyclic-GMP PhosphodiesterasesPhosphodiesterase 4 InhibitorsCyclic Nucleotide Phosphodiesterases, Type 4RolipramPhosphodiesterase 3 InhibitorsPhosphodiesterase 5 InhibitorsCyclic Nucleotide Phosphodiesterases, Type 3Human ActivitiesPhosphodiesterase ICyclic Nucleotide Phosphodiesterases, Type 1Cyclic Nucleotide Phosphodiesterases, Type 5BucladesineCyclic GMP2',3'-Cyclic-Nucleotide PhosphodiesterasesTheophyllineReceptors, Cyclic AMPPurinones4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinoneAdenylate CyclaseColforsinCyclic Nucleotide Phosphodiesterases, Type 2Cyclic Nucleotide Phosphodiesterases, Type 6MilrinoneKineticsPyrrolidinonesCyclic AMP Receptor ProteinIsoproterenolSulfonesCyclic Nucleotide Phosphodiesterases, Type 7Nucleotides, Cyclic8-Bromo Cyclic Adenosine MonophosphatePapaverinePurinesCyclic AMP-Dependent Protein KinasesAMP DeaminaseXanthinesEnzyme ActivationTransducinAdenosine MonophosphateCalciumRod Cell Outer SegmentPhotoreceptor CellsCalmodulinCyclic AMP Response Element-Binding ProteinCattleDose-Response Relationship, DrugCells, CulturedStimulation, ChemicalVinca AlkaloidsPyrophosphatasesMolecular Sequence DataAminophyllineDictyosteliumRats, Inbred StrainsThionucleotidesIsoenzymesSecond Messenger SystemsSyphilis SerodiagnosisCholera ToxinPhenylisopropyladenosineAlprostadilPyridazinesProstaglandins EPiperazinesEpinephrineProtein KinasesAmrinoneGlucagonAmino Acid SequenceGuanylate CyclaseGuinea PigsRana catesbeianaSignal TransductionDibutyryl Cyclic GMPCell MembraneBase SequenceCell LineHydrolysisGuanosine TriphosphateCyclic GMP-Dependent Protein KinasesAdenylate Cyclase ToxinRetinal Rod Photoreceptor CellsReceptors, Adrenergic, betaAdrenergic beta-AgonistsPhosphorylationCyclic IMPNucleotidasesTime FactorsGlycerylphosphorylcholineLiverAdenosine TriphosphateIsoquinolinesBinding SitesAminopyridinesRabbitsCarbolines