RT Journal Article SR Electronic T1 Phosphodieasterase 4 and phosphatase 2A differentially regulate cAMP/PKA signaling for cardiac myocyte contraction under stimulation of β1 adrenergic receptor JF Molecular Pharmacology JO Mol Pharmacol FD American Society for Pharmacology and Experimental Therapeutics DO 10.1124/mol.108.049718 A1 Vania De Arcangelis A1 Dagoberto Soto A1 Yang Xiang YR 2008 UL http://molpharm.aspetjournals.org/content/early/2008/08/14/mol.108.049718.abstract AB