Xanthine OxidaseXanthineXanthine DehydrogenaseXanthinesAdenineGuanineGuanine NucleotidesAdenine NucleotidesGuanine Nucleotide Exchange FactorsAllopurinolHypoxanthinesOxypurinolHypoxanthineGuanine DeaminaseMolybdenumPurinesAldehyde OxidaseGuanosine TriphosphateKineticsNADPteridinesUric AcidRho Guanine Nucleotide Exchange FactorsKetone OxidoreductasesGuanosine DiphosphatePentosyltransferasesSuperoxidesFree RadicalsFlavin-Adenine DinucleotideGTP-Binding ProteinsMilkGuanosineOxidation-Reductionras Guanine Nucleotide Exchange FactorsAdenine Nucleotide Translocator 1Molecular Sequence DataAdenosineBase SequenceDNAInosineTungstenHypoxanthine PhosphoribosyltransferasePurine NucleotidesCattleMitochondrial ADP, ATP TranslocasesCytosineSite-Specific DNA-Methyltransferase (Adenine-Specific)CoenzymesGuanylyl ImidodiphosphateGuanosine MonophosphateGuanosine 5'-O-(3-Thiotriphosphate)Purine NucleosidesAdenosine TriphosphateHydroxidesBinding SitesAdenosine MonophosphateNADPAdenine Nucleotide Translocator 2Amino Acid SequenceMutationIMP DehydrogenaseSuperoxide DismutaseAzaguanineElectron Spin Resonance SpectroscopyEscherichia coliHydroxyl RadicalAdenosine DiphosphateMetalloproteinsLiverTungsten CompoundsSubstrate SpecificityDNA AdductsReactive Oxygen SpeciesProtein BindingNucleobase Transport ProteinsNADPH OxidaseNucleic Acid ConformationReceptors, PurinergicHydrogen PeroxideThionucleotidesNucleotidesUrate OxidaseModels, MolecularOxygenGuanine Nucleotide Dissociation InhibitorsChromatography, High Pressure LiquidXanthopterinTheobromineNucleosidesEnzyme InhibitorsN-Glycosyl HydrolasesOxidoreductasesInosine MonophosphateHydrogen-Ion ConcentrationStructure-Activity RelationshipPterinsSpectrophotometryGuanine Nucleotide-Releasing Factor 2Adenylate CyclaseCell Line