title: Paradoxical stimulation by 1-methyl-3-isobutylxanthine of rat liver cyclic AMP phosphodiesterase activity.
mesh_terms: D015056:1-Methyl-3-isobutylxanthine / Q000494:pharmacology*; D015105:3',5'-Cyclic-AMP Phosphodiesterases / Q000037:antagonists & inhibitors / Q000378:metabolism*; D000818:Animals; D001667:Binding, Competitive; D006152:Cyclic GMP / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation / Q000187:drug effects; D007700:Kinetics; D008099:Liver / Q000201:enzymology*; D051381:Rats; D013806:Theophylline / Q000031:analogs & derivatives*
chemical_list: D013806:Theophylline; D015105:3',5'-Cyclic-AMP Phosphodiesterases; D006152:Cyclic GMP; D015056:1-Methyl-3-isobutylxanthine