3',5'-Cyclic-GMP PhosphodiesterasesCyclic GMPRod Cell Outer SegmentPurinonesPhotoreceptor Cells3',5'-Cyclic-AMP PhosphodiesterasesTransducinCyclic Nucleotide Phosphodiesterases, Type 6Rana catesbeianaPhosphoric Diester HydrolasesRhodopsinGuanosine TriphosphatePhosphodiesterase InhibitorsCattleKineticsGuanosine 5'-O-(3-Thiotriphosphate)LightMacromolecular SubstancesTrypsinDibutyryl Cyclic GMPPhosphodiesterase 4 InhibitorsCyclic Nucleotide Phosphodiesterases, Type 4Phosphodiesterase 5 InhibitorsRolipramPhosphodiesterase 3 InhibitorsCyclic Nucleotide Phosphodiesterases, Type 3Phosphodiesterase ICyclic AMPCyclic Nucleotide Phosphodiesterases, Type 51-Methyl-3-isobutylxanthineCyclic Nucleotide Phosphodiesterases, Type 1Guanylate Cyclase2',3'-Cyclic-Nucleotide PhosphodiesterasesNucleotides, Cyclic4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinoneMethylene BlueCyclic Nucleotide Phosphodiesterases, Type 2MilrinoneTheophyllineNitric OxideNitroprussideSulfonesCyclic GMP-Dependent Protein KinasesPyrrolidinonesPapaverineAtrial Natriuretic FactorPurinesGuanosine MonophosphateCyclic Nucleotide Phosphodiesterases, Type 7Oxadiazoles