Nucleotides, CyclicPhosphodiesterase Inhibitors3',5'-Cyclic-AMP PhosphodiesterasesPhosphoric Diester HydrolasesCyclic Nucleotide Phosphodiesterases, Type 1Cyclic GMPCyclic Nucleotide Phosphodiesterases, Type 32',3'-Cyclic-Nucleotide Phosphodiesterases3',5'-Cyclic-GMP PhosphodiesterasesCyclic Nucleotide Phosphodiesterases, Type 4Cyclic AMPPhosphodiesterase 4 InhibitorsNucleotidesCyclic Nucleotide Phosphodiesterases, Type 2Phosphodiesterase 3 InhibitorsRolipramCyclic Nucleotide Phosphodiesterases, Type 51-Methyl-3-isobutylxanthinePhosphodiesterase 5 InhibitorsPhosphodiesterase IPurinonesCyclic Nucleotide Phosphodiesterases, Type 74-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinoneDibutyryl Cyclic GMPTheophyllineMolecular Sequence DataCyclic Nucleotide-Gated Cation ChannelsKineticsBucladesineMilrinoneCyclic IMPAmino Acid SequenceCyclic Nucleotide Phosphodiesterases, Type 6CalmodulinAdenine NucleotidesAdenylate CyclasePyrrolidinonesPapaverineGuanine NucleotidesBase SequenceSulfonesCattlePolymorphism, Single NucleotidePurines8-Bromo Cyclic Adenosine MonophosphateColforsinCalciumGuanylate CyclaseEnzyme ActivationCloning, MolecularIsoenzymesCyclic GMP-Dependent Protein KinasesPhotoreceptor CellsCyclic AMP-Dependent Protein KinasesXanthinesIsoproterenolVinca AlkaloidsBinding SitesTransducinPurine NucleotidesGuanosine TriphosphateSecond Messenger SystemsThionucleotidesAdenosine TriphosphateCells, CulturedDose-Response Relationship, DrugMutationDNAHydrolysisRod Cell Outer SegmentEscherichia coli2',3'-Cyclic Nucleotide 3'-PhosphodiesteraseSubstrate SpecificityCyclic CMPPyrophosphatasesProtein KinasesRNA, MessengerSequence Homology, Amino AcidProtein BindingAminophyllineGuanine Nucleotide Exchange FactorsNitroprussideHyperpolarization-Activated Cyclic Nucleotide-Gated ChannelsRetinal Rod Photoreceptor CellsMolecular WeightCell LineDictyosteliumSignal TransductionPiperazinesAdenosine MonophosphateIon ChannelsGuanosine MonophosphateSequence Homology, Nucleic AcidBrainMagnesiumPyridazinesSequence AlignmentRats, Inbred StrainsSequence Analysis, DNAProtein Structure, Tertiary