Cyclic Nucleotide Phosphodiesterases, Type 13',5'-Cyclic-AMP PhosphodiesterasesCyclic Nucleotide Phosphodiesterases, Type 4Cyclic Nucleotide Phosphodiesterases, Type 3Cyclic Nucleotide Phosphodiesterases, Type 2Phosphoric Diester Hydrolases2',3'-Cyclic-Nucleotide PhosphodiesterasesNucleotides, CyclicPhosphodiesterase Inhibitors3',5'-Cyclic-GMP PhosphodiesterasesCyclic Nucleotide Phosphodiesterases, Type 5Cyclic GMPCyclic Nucleotide Phosphodiesterases, Type 7Cyclic AMPRolipram1-Methyl-3-isobutylxanthinePurinonesIsoenzymesMolecular Sequence DataCalmodulinAmino Acid SequenceKineticsCyclic Nucleotide Phosphodiesterases, Type 6NucleotidesPhosphodiesterase 3 InhibitorsPhosphodiesterase 4 Inhibitors4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinoneDibutyryl Cyclic GMPTheophyllinePhosphodiesterase ICyclic Nucleotide-Gated Cation ChannelsPhosphorus-Oxygen LyasesMilrinoneBucladesinePyrrolidinonesAdenine NucleotidesCyclic AMP-Dependent Protein KinasesCyclic GMP-Dependent Protein KinasesAdenylate CyclaseSecond Messenger SystemsPapaverineCyclic IMPBase SequenceColforsinGuanylate CyclaseCloning, MolecularPolymorphism, Single NucleotidePhosphodiesterase 5 Inhibitors8-Bromo Cyclic Adenosine MonophosphateCalciumGuanine NucleotidesCattleHydrolysisIsoproterenolXanthinesBinding SitesCatalytic DomainSignal TransductionVinca AlkaloidsCyclic P-OxidesEnzyme ActivationSubstrate SpecificitySequence Homology, Amino Acid