RolipramPhosphodiesterase Inhibitors3',5'-Cyclic-AMP PhosphodiesterasesCyclic Nucleotide Phosphodiesterases, Type 4Phosphoric Diester HydrolasesPyrrolidinones3',5'-Cyclic-GMP PhosphodiesterasesCyclic Nucleotide Phosphodiesterases, Type 3Phosphodiesterase 4 InhibitorsPhosphodiesterase 3 InhibitorsPhosphodiesterase 5 InhibitorsCyclic Nucleotide Phosphodiesterases, Type 1Phosphodiesterase IPurinonesCyclic AMP1-Methyl-3-isobutylxanthine4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinoneCyclic Nucleotide Phosphodiesterases, Type 52',3'-Cyclic-Nucleotide PhosphodiesterasesCyclic GMPMilrinoneCyclic Nucleotide Phosphodiesterases, Type 2Cyclic Nucleotide Phosphodiesterases, Type 7TheophyllineCyclic Nucleotide Phosphodiesterases, Type 6SulfonesPurinesPyridazinesVinca AlkaloidsColforsinCyclic AMP-Dependent Protein KinasesTransducinKineticsNucleotides, CyclicBucladesineRod Cell Outer SegmentAdenylate CyclaseIsoenzymesXanthinesPapaverineDose-Response Relationship, DrugPhotoreceptor CellsEnzyme ActivationIsoproterenolCyclopropanesPyrophosphatasesCalmodulinAminopyridinesCyclohexanecarboxylic AcidsGuinea PigsCattlePentoxifylline8-Bromo Cyclic Adenosine MonophosphatePiperazinesThionucleotidesPyridinesMolecular Sequence DataCalciumBenzamides